Came across some 799 heads and wanting to upgrade from my stock ones. Wondering how much would need to be milled so I could still use my 7.400 pushrods. I know some of you have done this, any info? What kind of comp. ratio would I be looking at? Will it be a noticeable gain?

 

subscribed 'cause i'm curious, too

 

from my math you would ahve to mill at least .025 to maintain stock compression...
from what iv been told every .007" will take out 1cc...

 

search 243's and find a plethora of answers

 

Mill 0.030 ' and you can keep the same pushrod. . You. Should be around 59 cc . Bump up compression . You should see '. Some nice gains ..