Like the title says.
Dart cast iron block with billet caps.
Blown alcohol Chevy 540 35 PSI.
Best ET in the 1/8 is 4.11 178.
I broke a World products block with billet caps due to a broken intake stud causing boost to go from 35 to 41 psi. This resulted in a torched head and pistons.

So the question is, I'm pushing the the limits of this block?