Current set-up is a built 306 stroker with a trickflow stage 3 cam, M90 supercharger (for ****s and giggles. lol) and other goodies.
my main question is the heads on the 306 currently are Gt40 heads with a full port and polish and 1.6 rocker. i plan to build a 408 stroker and turbo the motor. was wonderin if the heads off the 306 will work. or do i have to buy some other heads?

 

technically a 306 is not a stroker.

and gt40 heads will never flow enough to handle 408 cubes

 

so ATM would you say stock heads are better?

 

Maybe for an over sized paperweight. The GT40's are barely enough for a stock 302 let alone another 100+ cubes. You will need to spend the good 2K or so on getting a set of heads setup for what you want.

 

I smell bull****.... post up pics

 

PLEASE FOLLOW SECTION POSTING RULES!!!!!!!!
https://mustangforums.com/forum/5-0l...bers-read.html

 

http://www.youtube.com/watch?v=YOFua2N0jes

 

here is a vid of it. need to get better ones

 

GT-40 HEADS ARE TO SMALL FOR A 408, besides they would have to be drilled to accept 1/2 head bolts for a 351 based stroker.

 

Wait a minute, mjr is wrong! lol j/p

GT40's already have the 1/2 inch head bolt holes. Mine came that way at least and they were never toughed before I got them. Anyway that doesn't matter because they won't work for a 408. I don't even know why ford had them on the 351 in the first place because they are barely enough for a mild 302 build until they have extensive porting done.