stangman94

if you have 24 lb injectors and a cobra manifold you might have gt 40 heads.

AdderMk2

Im likeing my aluminum driveshaft/flywheel combo

frdmstng1986GT

can you tell if the revs build faster or if it helped youre acceleration in the seat of youre pants adder? just currious cause i have been thinking about doing the aluminum flywheel/driveshaft combo too.

XXXCustoms

Is there a way to find out if I have gt40 heads by external markings, or can I find out by pulling the valve covers?

frdmstng1986GT

http://www.stangpro.com/html/article...les/gt40p1.htmthere are a few ways to tell without taking anything apart.. 3 bars on the front of the head will mean gt-40's.. 4 bars will be the P's. also, they will either say GTP on them if they are P's and just GT on them if they are gt-40's. check the lank, alot of good info.

gearbanger

yea same hear i got the aluminum fly.... by getting the aliminum drive is enough to notice a diffrence? also what are the hp rating on a aluminum drive? (as in how much it can take)