KB, United Machine web site has a good cubic inch calculator on it scope
Plug in the bore size and then add the stroke you want to know about and get the answers up
I've built a bunch of 400 motors with different stroke from 3.75 all the way up to 4.300 so far shruggy
I normally use a custom piston from Diamond or Ross also to get the compression ratio I want on each motor work
What kind of power and use are you looking to build?

Last edited by Cab_Burge; 06/19/19 02:17 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)