gt40x heads

[cdiehl30]

Will gt40x heads work fine with a 347 stroker kit in an 88 gt?

 

[87foxstang]

yes, they are the same size as the stock 5L heads.

 

[PUNISHER RACING]

why are we posting twice?

 

[cdiehl30]

I didnt think that the first thing posted.....one more question...will these heads still put out like they would in a stock 302?

 

[PUNISHER RACING]

They are better suited for a 302 but will work on the 347 well while producing good torque Ford used them on a 385 horse 351 and a 450 horse 392 crate. They are a good head and are made with good quality they are just not the hottest ticket out there. Are yours the the 303 or 305 version (58 or 64)cc. They will work well with that F cam and this will be a pretty driveable piece. The F cam likes nitrous!

 

[cdiehl30]

They are the x303 version. Is that good or bad? How much hp will these add with the 347? One more question,....i ordered the a9l tto switch my car to mass air. Will it work as speed density with this set up?

 

[cdiehl30]

also, if i am low on money, will the stock injectors and fuel pump work for now? would they work okay with a 150 shot?

 

[PUNISHER RACING]

That is a definate upgrade area in my opinion. If all else fails get a set of 24's out of a junkyard 460 truck motor and a 255 intank they are like 100 bucks. You will need the mass air upgrade for sure (camshaft) the x303 version is 58 cc that will give the motor a bit more comp. and will help in the seat of pants dept. n/a they will add about 40 horse but will shine when the nitrous is used

 

[cdiehl30]

If the motor was left to a 302, would the hp gain still be about 40,.....? does this question have anything to do with that?

 

[olesneakypete12]

i'm pretty sure it would still be around 40, am i right guys?

 

[PUNISHER RACING]

you would be lookin at about 40 horse and say another 20 or so based on cubic inches if made a 347