I think that your proposal will be good for a pump gas torque monster that will be RPM limited by the carbs, exhaust manifolds and small cam. The compression ratio will tame it a lot, too. It should be relatively civilized and long lived with a lot of wow factor
1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer