[El Dorado Jim]

I am running those manifolds on my 72 with a 350 and run manifolds on my other vehicles with small blocks, the only reason I run headers on my trucks with 454's is that the cast iron manifolds crack real easy and are expensive.....the headers aren't that expensive..I am constantly replacing the collector gaskets....I just bought a set of aluminum gaskets and am trying them to see if they are worth the $20.00, and I have to run the protestors on the plug wires...and still burn wires occasionally.....I may go back to cast iron manifolds...