My neighbor is building a Y-block for his 56 Bird. It is 335 cu but otherwise pretty much stock parts. 57 Cast iron intake and exhaust manifolds. Stock converter, stock rear end. 9.5 compression, G heads. He wants a rumble but not a tempremental street engine. Question is between Isky E-4 or F-300. Looks like a toss-up to me. Anyone running either cam?