Originally Posted by AndyF
I'm working with a race team who is putting a 572 inch wedge (Indy block and heads) into a B body race car.

What kind of "B body race car?"
Tube frame, back half, ladder bar, 4-link, weight ?

Depending on weight and chassis., it could benefit from either one.
But without more info, a 800 hp engine in a 3100 lb car with a good chassis would be a great bracket car with a PG and the right converter.
A 750 hp engine in a 3400 lb car with a good chassis could work well with a 3-speed transmission.