V6 to V8 swap

Therealtater · February 8th, 2011, 09:24 PM

Hey guys, I was offered a motor out of a 99 GT today, the guy with the motor wants to put a Lincoln 4v in his car, and to get the money he is going to scrap a 88 Caddy, and whatever the difference is, he will sell the 4.6 to me for, I figured it would be cheaper to do the swap then hook up everything I was going to do to the V6 in my car, I know I swap out wiring harnesses and computers, is there anything else? and will the V6 trans hold up with the V8?

2000stallion · February 8th, 2011, 09:34 PM

Uhm, well have you done an engine swap before? If so, go for it. If not, sell your car and buy a GT.

Therealtater · February 8th, 2011, 09:38 PM

Originally Posted by 2000stallion

Uhm, well have you done an engine swap before? If so, go for it. If not, sell your car and buy a GT.

Yeah, I've done several engine swaps and rebuilds, everything from Saturn ions to 69 Mustangs

2000stallion · February 8th, 2011, 09:41 PM

Well in that case...i think you need the k-member from the gt. Also another thing is your rear end. I mean you can run a 7.5 but i would get an 8.8. And i think youll need a diff bellhousing for the tranny. As for power wise, the tranny should have no problem holding up.

2000stallion · February 8th, 2011, 09:43 PM

Just curious...what did you have planned for the 6?

Therealtater · February 8th, 2011, 09:46 PM

Originally Posted by 2000stallion

Just curious...what did you have planned for the 6?

windstar intake kit w/the GT T/B, SCT tune, 3.73 gear, and a turbo

2000stallion · February 8th, 2011, 09:50 PM

Originally Posted by Therealtater

windstar intake kit w/the GT T/B, SCT tune, 3.73 gear, and a turbo

word. well, the windstar wont work on the GT. But the rest sounds good.

Therealtater · February 8th, 2011, 09:52 PM

Originally Posted by 2000stallion

word. well, the windstar wont work on the GT. But the rest sounds good.

Yeah I knew the windstar wouldn't work, I'm just glad I got this offer before I went out and bought the windstar kit cause I was gonna order it friday

Therealtater · February 8th, 2011, 09:53 PM

Yeah I knew the windstar wouldn't work, I'm just glad I got this offer before I went out and bought the windstar kit cause I was gonna order it friday

2000stallion · February 8th, 2011, 09:55 PM

Yeah. the windstar is pretty cool on 6s, but if you can swap it and its not too expensive, id say go for it.

Therealtater · February 10th, 2011, 02:49 PM

that's what I was thinking too, I don't really wanna pay a whole lot so I'm hoping he gets a whole lotta money for scrapin the Caddy

Mr. Red Pony · February 10th, 2011, 02:51 PM

You also need a computer, instrument cluster, K-member, trans and/or bell housing, rear end, and some other oddities.

Therealtater · February 10th, 2011, 03:06 PM

Originally Posted by Mr. Red Pony

You also need a computer, instrument cluster, K-member, trans and/or bell housing, rear end, and some other oddities.

i knew I needed the computer and wiring, I was hoping I wouldn't need the trans though, why would I have to swap out the instrument cluster?

keyba · February 10th, 2011, 03:12 PM

I'm not sure bout the cluster but I am almost 100% sure you don't have to swap the member all u should need is the different motor mounts for the 4.6

Therealtater · February 10th, 2011, 03:26 PM

Originally Posted by keyba

I'm not sure bout the cluster but I am almost 100% sure you don't have to swap the member all u should need is the different motor mounts for the 4.6

Everyone else has told me to swap the K member though so it won't hurt anything but my wallet, and I'm gettin the motor mounts when I get the motor anyway

and on a sidenote, I love your car, the 69-70 fastback is one of my favorite cars ever

keyba · February 10th, 2011, 04:07 PM

Yea I love my 70 I just need to finsh my 88 notch so I can start workin on that one

SlowSix · February 10th, 2011, 04:16 PM

You def need to swap the k member. And you also need some other suspension stuff to handle the extra weight of the v8

Therealtater · February 10th, 2011, 04:30 PM

Originally Posted by 01SilverSixer

You def need to swap the k member. And you also need some other suspension stuff to handle the extra weight of the v8

its got a stage 1 roush suspension on it, would that be enough?

casper gt · February 10th, 2011, 10:14 PM

your forgetting the fuel system, the exhaust system, radiator & fan, air intake ststem including the MAF, flywheel, clutch, complete a/c system, brake booster & master cyl.

also yes, you will need to swap to a GT instrament cluster.

bell housing patern is diffrent so you'll need a v-8 trans.

you'll also need to swap the rear axle if you ever plan on driving it hard.

bottom line, v-6 to v-8 swaps in these cars require a donor GT to do it right.

just sell the v-6 & get a GT if you want a v-8.

mustangmike! · February 10th, 2011, 10:29 PM

This ^^^

February 8th, 2011, 09:24 PM	#1
Therealtater Regular 2003 Roush Mustang Stage1 Join Date: Feb 2011 Location: Waxhaw Posts: 239 iTrader: 0 reviews	V6 to V8 swap Hey guys, I was offered a motor out of a 99 GT today, the guy with the motor wants to put a Lincoln 4v in his car, and to get the money he is going to scrap a 88 Caddy, and whatever the difference is, he will sell the 4.6 to me for, I figured it would be cheaper to do the swap then hook up everything I was going to do to the V6 in my car, I know I swap out wiring harnesses and computers, is there anything else? and will the V6 trans hold up with the V8?

February 8th, 2011, 09:34 PM	#2
2000stallion Hardcore Enthusiast 2000 Mustang slow@slow Join Date: Oct 2009 Location: Kansas Posts: 2,000 iTrader: 1 reviews	Uhm, well have you done an engine swap before? If so, go for it. If not, sell your car and buy a GT. __________________ For Sale: 99-04 smoked tail light covers 2000stallions Build Thread

February 8th, 2011, 09:41 PM	#4
2000stallion Hardcore Enthusiast 2000 Mustang slow@slow Join Date: Oct 2009 Location: Kansas Posts: 2,000 iTrader: 1 reviews	Well in that case...i think you need the k-member from the gt. Also another thing is your rear end. I mean you can run a 7.5 but i would get an 8.8. And i think youll need a diff bellhousing for the tranny. As for power wise, the tranny should have no problem holding up. __________________ For Sale: 99-04 smoked tail light covers 2000stallions Build Thread

February 8th, 2011, 09:43 PM	#5
2000stallion Hardcore Enthusiast 2000 Mustang slow@slow Join Date: Oct 2009 Location: Kansas Posts: 2,000 iTrader: 1 reviews	Just curious...what did you have planned for the 6? __________________ For Sale: 99-04 smoked tail light covers 2000stallions Build Thread

February 8th, 2011, 09:55 PM	#10
2000stallion Hardcore Enthusiast 2000 Mustang slow@slow Join Date: Oct 2009 Location: Kansas Posts: 2,000 iTrader: 1 reviews	Yeah. the windstar is pretty cool on 6s, but if you can swap it and its not too expensive, id say go for it. __________________ For Sale: 99-04 smoked tail light covers 2000stallions Build Thread

February 8th, 2011, 09:53 PM	#9
Therealtater Regular 2003 Roush Mustang Stage1 Join Date: Feb 2011 Location: Waxhaw Posts: 239 iTrader: 0 reviews	Yeah I knew the windstar wouldn't work, I'm just glad I got this offer before I went out and bought the windstar kit cause I was gonna order it friday

February 10th, 2011, 02:49 PM	#11
Therealtater Regular 2003 Roush Mustang Stage1 Join Date: Feb 2011 Location: Waxhaw Posts: 239 iTrader: 0 reviews	that's what I was thinking too, I don't really wanna pay a whole lot so I'm hoping he gets a whole lotta money for scrapin the Caddy

February 10th, 2011, 02:51 PM	#12
Mr. Red Pony Resident badass 01 Built V6 (3.9) 13.91 @ 99.1 N/A Join Date: Jan 2010 Location: Lawton, Oklahomo Posts: 6,789 iTrader: 10 reviews	You also need a computer, instrument cluster, K-member, trans and/or bell housing, rear end, and some other oddities. __________________ 271rwhp N/A V6 The Name is Danny. I'm a GM Technician. Suck it.

February 10th, 2011, 03:12 PM	#14
keyba Regular 1999 Mustang v6 16.2 Join Date: Mar 2008 Location: Munster, In Posts: 396 iTrader: 0 reviews	I'm not sure bout the cluster but I am almost 100% sure you don't have to swap the member all u should need is the different motor mounts for the 4.6 __________________ FLICKR TAKE A LOOK Keyba's 70 Mach 1 build POLICE SCANNER F/S[/SIZE]

February 10th, 2011, 04:07 PM	#16
keyba Regular 1999 Mustang v6 16.2 Join Date: Mar 2008 Location: Munster, In Posts: 396 iTrader: 0 reviews	Yea I love my 70 I just need to finsh my 88 notch so I can start workin on that one __________________ FLICKR TAKE A LOOK Keyba's 70 Mach 1 build POLICE SCANNER F/S[/SIZE]

February 10th, 2011, 04:16 PM	#17
SlowSix Formerly 01silversixer 2001 V6 15.47@89.57 Join Date: May 2010 Location: Pittsburgh, PA Posts: 3,471 iTrader: 1 reviews	You def need to swap the k member. And you also need some other suspension stuff to handle the extra weight of the v8 __________________ Build Thread

February 10th, 2011, 10:14 PM	#19
casper gt Moderator 2012 300a gt auto 12.10@116 Join Date: Mar 2008 Location: creighton pa Posts: 7,697 iTrader: 4 reviews	your forgetting the fuel system, the exhaust system, radiator & fan, air intake ststem including the MAF, flywheel, clutch, complete a/c system, brake booster & master cyl. also yes, you will need to swap to a GT instrament cluster. bell housing patern is diffrent so you'll need a v-8 trans. you'll also need to swap the rear axle if you ever plan on driving it hard. bottom line, v-6 to v-8 swaps in these cars require a donor GT to do it right. just sell the v-6 & get a GT if you want a v-8. __________________ MM BRACKET RACING CREW CO-FOUNDER BAMA Performance Drag Team Founder 2012 300a GT auto

February 10th, 2011, 10:29 PM	#20
mustangmike! I Post Entirely Way Too Much 2004,1994,1967 14.37 @ 96 Join Date: Aug 2008 Location: Texas Posts: 6,018 iTrader: 1 reviews	This ^^^ __________________ 227whp N/A V6 Now w/ 8th Mile 8s ! How To Jmod Your Late Model 4R70W

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