A bigger bore is-the-plan ? .. then you better TALK with the engineers that designed the V-10 motors ...and how about the exotics from Europe ?

I am a fan of the 413 ... since the cyl wall thickness is famous for being best-er than a 440....in general.

Piston availability ? ... I hope to be doing something about that. I am a fan of the RV motor ...which is a feeble piece due to the fuel delivery, camshaft and of course COMPRESSION ratio. Some of those have speced-out to - in the neighborhood of - 6.5 to one !

Some GOOD pistons will help that out.