408 LA build

OP, I'd call Bullet, Racer Brown, or Crower and tell them your combo. They'll be able to guide you from there. Also, if you have your valve spring part # and PTV clearance, that'll help them too. Not entirely necessary, but it helps to have those figures handy.

Also, the cam, rear gears, and the convertor should ideally be matched. I run an 8" PTC convertor with a remote cooler (w/fan) and it helps control the Temps. 4:10 gears in a D60. It's never got hot and I street drive the piss out of it.

Your goal is certainly within reach with your combo.