429 swap in a 73 351 cleveland mach questions

73mach1 · March 16th, 2007, 06:41 PM

hello all i am new to this site
wondering if anyone had some information to help me
i have a 73 mach1 with original 351c and 4speed toploader
i took it on a long trip and needless to say it didn't make it i cracked my block. the motor is shot. so looking for a new motor
i know of a guy that has a 429 2bolt main out of a 71 passenger car for 400 dollars, it has to be rebuilt but it is a complete motor
wondering what all i need to complete this swap. bellhousing? motor mounts? flywheel? clutch? clutch linkage? any help greatly appreciated or opinions to decide if this swap is even worth the trouble

73mach1 · March 16th, 2007, 06:41 PM

hello

UBY 289 · March 16th, 2007, 06:52 PM

Wish I could help you . I have 289 and dream of a big block 4 speed.

latamud · March 16th, 2007, 11:19 PM

Swapping small block to big block, you will need everything, headers, tranny, motor mounts, radiator maybe(probably), maybe front coil springs too. Sounds like a fun project though.

69fastback · March 16th, 2007, 11:29 PM

The 351C is not a small block, but I really have no idea what it would take.

latamud · March 16th, 2007, 11:53 PM

Originally Posted by 69fastback

The 351C is not a small block, but I really have no idea what it would take.

http://www.corral.net/forums/showthr...cdc76&t=888342
http://www.corral.net/forums/showthread.php?t=878701
http://www.madabout-kitcars.com/kitcar/kb.php?aid=141

Horseshoeing · March 18th, 2007, 09:01 AM

I think they make kits for the swap.

Kobra Killer · April 3rd, 2007, 04:35 PM

If you are going swap in a big block go with the 460. The 429 only gets you 50-100 HP over a Boss 351C.

Horseshoeing · April 4th, 2007, 06:00 AM

A stock 1977 460 in a Mark V made 210 horses..............I say put that one in.

Dave · April 7th, 2007, 09:57 PM

The 460 can be badass, depending on what you have to work with, remember there are not too many big block cars out there, and when you find em, it is alot of fun to see em working.

Regardless of the swap kit, the big block can impress you heavily depending on what cam, rods, heads, androcker arms you have.

429 I am unsure of I have an unrebuilt block on the garage floor, but ave ever done anyhing with it. The 460 was rebuilt,(that came with the car that was in pieces) so we obviously used that. There are many ways to go, an dI am no "expert" butI did build a few awesome rides , that i get compliments on. Ohand I enjoy them , and I am not dead.

Would like to help best I can spec wise, butlet me now if you need detailed info on stuff.

Bueno Suerte,

Dave!

Dave · April 8th, 2007, 10:50 AM

Also it is VERY VERY important to install the 429 front springs with Airconditions for the heaviest duty, the regular springs will sag under the weight of the larger engine.

I have done the bigblock swap, let me know of any questions you have.

Horseshoeing · April 9th, 2007, 06:08 AM

Big block are fine, just don't think a stock big block is going to make your car fast. Many of them were dogs. We all know you can make them fast, but most of them you have to make them fast.

Dave · April 11th, 2007, 08:42 PM

Agreed when i found this project in a pile of parts, it came with an extremely HUGE cam, heavy duty rods, 1.7 aluminum roller rocker arms DOVE-A and DOVE-C heads ( I used the Dove-A heads), hooker racing headers, and now it is fast.

I also got a bunch of the stock parts and after comparing them, yeah no stock parts. Also ended up with drag oil pans i did not use plus another big block which is still on the floor of the garage and needs rebuilding.

car is barely streetable, but I can be heard for 1/2 a mile if I hit the gas.

Still need a detroit locker as I have a one tire fire, and its fun to keep being able to making it better, and I haveall the time I want to do it.

My Dad and I built that car and he passed away from cancer last Feb, he was too scared of it, he only drove it once, and left an 150 burnout in the driveway,(which is why he only drove it one mor3e time...really slow)

anyway not trying to give you a huge story on my stuff, but the performance parts will make a HUGE difference.

Katen · April 12th, 2007, 04:01 PM

to do the swap you must massage the engine compartment. it will fit but with some problems. the most serious thing you have to do is the fron suspension. you need to put heavy duty or tubular parts on. you will need to find a new bellhousing for sure. also brakes need to be redone, due to the new weight in the front. i think that is all that needes to be dano though. could be wrong.
best of luck

Keith

Dave · April 12th, 2007, 08:34 PM

Oh I almost forgot you will need new motor mountswelded in. And to agree with Katen, brakes are important, when we reassembled the car we looked up the stock info for a 429cj Mustang, and got an aftermarket kit with decent looking calipers.

If you over do it, you will have low brake pressure, I havent really tried to slow down too rapidly, cuz I know its not like new car brakes.

March 16th, 2007, 06:41 PM	#1
73mach1 Newbie Join Date: Mar 2007 Posts: 2 iTrader: 0 reviews	429 swap in a 73 351 cleveland mach questions hello all i am new to this site wondering if anyone had some information to help me i have a 73 mach1 with original 351c and 4speed toploader i took it on a long trip and needless to say it didn't make it i cracked my block. the motor is shot. so looking for a new motor i know of a guy that has a 429 2bolt main out of a 71 passenger car for 400 dollars, it has to be rebuilt but it is a complete motor wondering what all i need to complete this swap. bellhousing? motor mounts? flywheel? clutch? clutch linkage? any help greatly appreciated or opinions to decide if this swap is even worth the trouble

March 16th, 2007, 11:19 PM	#4
latamud Regular Join Date: Feb 2007 Location: Dayton, OHIO Posts: 158 iTrader: 0 reviews	Swapping small block to big block, you will need everything, headers, tranny, motor mounts, radiator maybe(probably), maybe front coil springs too. Sounds like a fun project though. __________________ 66 Coupe, Supercharged 408 Clevor, Viper T56, Cobra IRS 66 Coupe, Supercharged 03 Cobra drivetrain and suspension (project) 03 Viper, Supercharged

March 16th, 2007, 11:29 PM	#5
69fastback Premium Member 1969 Mustang Mach 1 6.824@101.61 Join Date: Aug 2006 Location: Oklahoma jackass, get to driving Posts: 5,572 iTrader: 0 reviews	The 351C is not a small block, but I really have no idea what it would take. __________________ ./___ _ ____ ___ \. ( ]]] _ _ O _ _ [[[ ) \_ o _ _____ _ o _/ \|___\| ......... \|___\| http://www.youtube.com/watch?v=HyYU3...e_gdata_player

March 18th, 2007, 09:01 AM	#7
Horseshoeing Classic Moderator Join Date: Aug 2005 Location: GA Posts: 4,177 iTrader: 0 reviews	I think they make kits for the swap. __________________ Classic Mustangs are the best! Get one.

April 3rd, 2007, 04:35 PM	#8
Kobra Killer Regular Join Date: Sep 2006 Posts: 123 iTrader: 0 reviews	If you are going swap in a big block go with the 460. The 429 only gets you 50-100 HP over a Boss 351C. __________________ Clevelands Rule https://home.comcast.net/~jimmiephil...er_project.htm

March 16th, 2007, 06:52 PM	#3
UBY 289 Newbie Join Date: Mar 2007 Posts: 35 iTrader: 0 reviews	Wish I could help you . I have 289 and dream of a big block 4 speed.

April 4th, 2007, 06:00 AM	#9
Horseshoeing Classic Moderator Join Date: Aug 2005 Location: GA Posts: 4,177 iTrader: 0 reviews	A stock 1977 460 in a Mark V made 210 horses..............I say put that one in. __________________ Classic Mustangs are the best! Get one.

April 7th, 2007, 09:57 PM	#10
Dave Regular Join Date: Apr 2007 Posts: 62 iTrader: 0 reviews	The 460 can be badass, depending on what you have to work with, remember there are not too many big block cars out there, and when you find em, it is alot of fun to see em working. Regardless of the swap kit, the big block can impress you heavily depending on what cam, rods, heads, androcker arms you have. 429 I am unsure of I have an unrebuilt block on the garage floor, but ave ever done anyhing with it. The 460 was rebuilt,(that came with the car that was in pieces) so we obviously used that. There are many ways to go, an dI am no "expert" butI did build a few awesome rides , that i get compliments on. Ohand I enjoy them , and I am not dead. Would like to help best I can spec wise, butlet me now if you need detailed info on stuff. Bueno Suerte, Dave!

April 8th, 2007, 10:50 AM	#11
Dave Regular Join Date: Apr 2007 Posts: 62 iTrader: 0 reviews	Also it is VERY VERY important to install the 429 front springs with Airconditions for the heaviest duty, the regular springs will sag under the weight of the larger engine. I have done the bigblock swap, let me know of any questions you have.

April 9th, 2007, 06:08 AM	#12
Horseshoeing Classic Moderator Join Date: Aug 2005 Location: GA Posts: 4,177 iTrader: 0 reviews	Big block are fine, just don't think a stock big block is going to make your car fast. Many of them were dogs. We all know you can make them fast, but most of them you have to make them fast. __________________ Classic Mustangs are the best! Get one.

April 11th, 2007, 08:42 PM	#13
Dave Regular Join Date: Apr 2007 Posts: 62 iTrader: 0 reviews	Agreed when i found this project in a pile of parts, it came with an extremely HUGE cam, heavy duty rods, 1.7 aluminum roller rocker arms DOVE-A and DOVE-C heads ( I used the Dove-A heads), hooker racing headers, and now it is fast. I also got a bunch of the stock parts and after comparing them, yeah no stock parts. Also ended up with drag oil pans i did not use plus another big block which is still on the floor of the garage and needs rebuilding. car is barely streetable, but I can be heard for 1/2 a mile if I hit the gas. Still need a detroit locker as I have a one tire fire, and its fun to keep being able to making it better, and I haveall the time I want to do it. My Dad and I built that car and he passed away from cancer last Feb, he was too scared of it, he only drove it once, and left an 150 burnout in the driveway,(which is why he only drove it one mor3e time...really slow) anyway not trying to give you a huge story on my stuff, but the performance parts will make a HUGE difference.

April 12th, 2007, 04:01 PM	#14
Katen Regular 1973 Coupe Mustang as fast as the restoration is going Join Date: Jan 2007 Location: Defiance, Ohio Posts: 142 iTrader: 0 reviews	to do the swap you must massage the engine compartment. it will fit but with some problems. the most serious thing you have to do is the fron suspension. you need to put heavy duty or tubular parts on. you will need to find a new bellhousing for sure. also brakes need to be redone, due to the new weight in the front. i think that is all that needes to be dano though. could be wrong. best of luck Keith

April 12th, 2007, 08:34 PM	#15
Dave Regular Join Date: Apr 2007 Posts: 62 iTrader: 0 reviews	Oh I almost forgot you will need new motor mountswelded in. And to agree with Katen, brakes are important, when we reassembled the car we looked up the stock info for a 429cj Mustang, and got an aftermarket kit with decent looking calipers. If you over do it, you will have low brake pressure, I havent really tried to slow down too rapidly, cuz I know its not like new car brakes.

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