Just a comment, I thought Studebaker was absorbed into AMC so how could it be a MOPAR (although the 318 is a nice engine)? Being a former Fordnatic, but cheap, it is hard for me to imagine the mess of adapting a driveline without a lot of parts availability, so that's how I arived at a choice of a 350 SBC and I RELY (!) on 20 years of aftermarket engineering on the SBC and the ready parts list and interchangability (just like the old line of FORD: 32-48). If you need more build a 383! Just my opinion.
Don Shillady
Retired Scientist/teen rodder