[83five0]

I'm itching to get my mustang back on the road, but I cant wait to finish building the motor. I found a complete stock 5.0 motor for sale for $375 and of course its used. My question is can you take the FI intake and other parts off and put a carb intake on a FI block?? Another question is I'm pretty sure it has a roller cam but I have a hydraulic flat tappet cam out of my old motor. Can I switch these out, or will there be a problems with the flat lifters in a roller block? I will also be putting different heads on as well. So basicaly I want to know if I can take a FI 5.0 and switch the roller cam to flat tappet, and if I can switch the FI to carb. Thanks for any input yall can shed on this subject.

[83five0]

does anybody know??

[sb2f5marine69]

why change to a flat tappet????????? Its been proven time and time again roller is worth way more power, and yes u can carb it with no problems, but i would run a roller cam man or ur basically taken 2 steps back.

[5literJeff]

Just a heads up that some carbed intakes like the edelbrock performer rpm and others that are tall or sit higher then stock wont clear a stock distributor.

Also you will need to change the fuel pressure from 38 psi to about 6-7 psi to work with a carb.

And its very do-able swap. Mines carb'd now. Alot of people swear by the fuel injection but I love the ease of working with the carb.

[1slo5.0]

Why change to flat tappet and why change to carb?????

[83five0]

flat tappet=cheaper, and why change to carb? my car is an 83 and it is carbuerated therefore no computer to run the fuel injection. i havent had a problem yet with the intake clearing the stock dist. just my air cleaner clearing the stock hood . i will probably stay with the roller cam i just heard the lifters wear out quicker especially the spring loaded ones.

[1slo5.0]

Originally Posted by 83five0 flat tappet=cheaper, and why change to carb? my car is an 83 and it is carbuerated therefore no computer to run the fuel injection. i havent had a problem yet with the intake clearing the stock dist. just my air cleaner clearing the stock hood . i will probably stay with the roller cam i just heard the lifters wear out quicker especially the spring loaded ones.

If you get an 87-93 H.O.engine, leave the factory roller cam in and put your stock intake on or whatever intake you choose. Roller lifters do not wear out faster, in fact it is just the opposite. That is why they are using them from the factory now because they are more reliable. When you get into race engines with huge valve spring pressures, the lifters wear out quickly but that is not the same as a stock 5 liter engine.

[83five0]

this is what i have for the top end that i would be putting on the motor. i have a comp cam 287 flat tappet cam with the stock heads ported and polished, a victor jr intake, and a holley 750DP. as soon as i get the money to get heads i am going to buy a set of victor jr heads and get them ported and polished. but as for the intake and carb thats what ive got so thats what im runnin. if anybody has any recomendations about a different cam i could use with stock heads let me know

[1slo5.0]

I'd take the stock roller cam over a hydraulic flat tappet.

[83five0]

ok this is what i have on my list so far. the stock bottom end, stock heads, victor jr intake, 750DP carb, stock dist with MSD ignition (i junked the old one), long tubes and v-belt setup. now i need to know a good aftermarket roller cam i can get to use in this motor. i probably wont see much HP or TQ gains with stock heads so i want a real lopey idle but without robbing any HP that IS there. if its not gonna be that mean then i want it to sound mean. the motor i will be building while this one is running is gonna be a different story. 310, steel crank, forged eagle rods, forged 10.1 comp speed pro pistons, edlebrock victor jr heads ported and polished, custom ground cam for my setup from comp cams, edelbrock victor intake ported, 750DP, 125 shot nitrous, full MSD ignition, and long tubes. the drivetrain to back this up will be a C4 3800 stall, alum driveshaft, 8.8 rearend with 4.10's. lots of suspension and chassis work. track use and saturday night special use only.

from experience what will the difference be from the first motor setup and second. besides strength.

[ih8chevy]

i would say that the carb is way too big. that is the same carb on a bb 390 of mine and it runs beautifully. there is no reason to have it on a 302 that is mostly stock

jmo

[83five0]

im gonna go ahead and get it for my other motor because i sold my 650 edelbrock and i dont wanna buy 2 carbs in the next year......ill save money this way

[1slo5.0]

Originally Posted by 83five0 ok this is what i have on my list so far. the stock bottom end, stock heads, victor jr intake, 750DP carb, stock dist with MSD ignition (i junked the old one), long tubes and v-belt setup. now i need to know a good aftermarket roller cam i can get to use in this motor. i probably wont see much HP or TQ gains with stock heads so i want a real lopey idle but without robbing any HP that IS there. if its not gonna be that mean then i want it to sound mean. the motor i will be building while this one is running is gonna be a different story. 310, steel crank, forged eagle rods, forged 10.1 comp speed pro pistons, edlebrock victor jr heads ported and polished, custom ground cam for my setup from comp cams, edelbrock victor intake ported, 750DP, 125 shot nitrous, full MSD ignition, and long tubes. the drivetrain to back this up will be a C4 3800 stall, alum driveshaft, 8.8 rearend with 4.10's. lots of suspension and chassis work. track use and saturday night special use only. from experience what will the difference be from the first motor setup and second. besides strength.

A Trick Flow stage 1 cam or F303 cam will work good. Make sure you install new valve springs that match the cam you choose. The carb will work fine. It is a bit on the big side but I doubt it will hurt you much.

[83five0]

i am going to put new springs retainers and seals in the heads anyway since it will be torn down to the heads. the higher the lift the more spring pressure i need right?

[1slo5.0]

Originally Posted by 83five0 i am going to put new springs retainers and seals in the heads anyway since it will be torn down to the heads. the higher the lift the more spring pressure i need right?

The best way is to buy the cam and ask what they recommend for springs.

[83five0]

i was wondering do some cam kits come with the new springs also? and another question, there really isnt a difference between stock heads that are ported and polished than aftermarket heads except the weight and material difference correct? i know aluminum is lighter and also discipates heat quicker but what would be the HP difference if you had your stock heads ported to the same specs as a set of aftermarket heads?

[Tony_90fox]

you can port and polish stock heads all you want, but i have heard they will not touch an off the shelf aluminum head.

[1slo5.0]

There is a big difference between stock heads and aftermarket heads. You can port stock heads all you want but they will never touch a good aftermarket head. There is alot more to heads than shining up ports.