cc's of 915 BB heads

what do they generally run? I couldn't find anything in the archives. Any thoughts on how much I can plunge cut around the valves to increase the cc's to get my CR when I need it to be without hitting water? Thank you for your time.

Mine CC at 80 this was with the stock valves 2.08 and 1.60.

Thanks Bro. I didn't realize they were that big, I've been on small blocks too long. I think this will work out ok.

I have 2 sets with std valve size. One with SS. chambers range from 77 to 79. Both had a clean-up cut.

Isn't there a link somewhere to get CC specs on port vol also ?

What i was thinking of earlier this AM was a 440 block stroker(4.25) with 392 early hemi rods & an olds 403 piston. But after reading(& thinking) some more I'd probably be faster by a plain ol 451 & some of the $899 stealth heads & have one of the head guys here check them over.