Thank you all for your honesty.
The odd combos come from engines that I knew would Rev( N2O makes alot of TQ at the RPM it is needed), so I was looking for a shorter stroke and less than 500 CID.
Last year Muscle Car magazine had an article on the F.A.S.T. racing class of Stock appearing cars. In this article was a Corvette with a 511 CID based on a 454 BBC. It featured a 4.375 inch bore and a 4.25 stroke( the bore was a full 1/8 overbore and the stroke is common) I have also seen this in Car Craft with a 4.31 bore(+.060) and a 4.375 inch stroke.
My question is which is easier to build from the stand point of availabilty of usable blocks & commonly produced cranks( production or aftermarket)?
How many off Y'all have had a Tunnel Rammed combo on the street, is this a waste of time with the newer single plane single four manifolds?