Bringing a 1947 M5 back to life... I initially considered replacing the champion 6 with a modern V8. My dad strongly protested so we compromised on a rebuild with an attempt at increasing the power it would make. Over the last year I was able to locate an Offenhauser dual inatake and carbs, a split exhaust manifold, and of all things, an Eddie Edmunds aluminum cyclindar head made back in the 50's. The machinist has it all mocked up now and has measured everything. He determined we are now looking at a 9.6 to 1 compression ratio, largely due to the smaller chambers in the aluminum head. 9.6 to 1 would be no big deal in a modern V8 using aluminum heads. I just want to check with the SDC community to see if this all sounds good as it relates to a 185 CI champion 6 cyl? It should run just fine on premium pump gas, and I would expect the aluminum head to disipate the heat just fine. Are we overlooking anything, or creating other potential problems? Sure appreciate any feedback. It's getting pretty hard to find anyone who has much experience hot rodding Studebaker sixes anymore.