RHS flow #'s

I thought you had pistons cut down?
that would point at a 349.

no big, just not a small thing to forget.lol

so you saying you got a 4'' bore 318 with 4'' crank, right?

well if all's good on the sonic check it won't distort + side thrust=boom.

cool.

Yes 4" Bore, Brian checked it all out and it is good. I switched to 360 pistons to go with the 3.58 crank I thought I had when I found out it could be bored to 4.0..........Butttttt then the crank was found out to be a 4.0 so switched the pistons out to forged KB units and now it is a 402

Justin, this is one of the blocks I got from you!!