572/620

[lightingrod]

I'm going to install a 572/620 in my 74. I'm wondering about sidepipe header clearance. The 572 uses a tall deck block 10.2" vs 9.8" of a standard GM BBC. The exhaust ports are also raised .200" I think! This means around 6/10's of an inch taller.

Anyone been here?

Thanks,

Al