Stock Intake manifolds

[Billla]

Originally Posted by Slonaker

FWIW, I have a cast aluminum intake on mine that looks identical to the cast iron one that came off. It is a factory item, and I see them occasionally in junkyards. It saves a little weight if nothing else.

My mechanic buddy, who knows more about smallblocks than anyone I have ever met, says that EGR helps reduce ping. It is the one emission control device that he actually likes.

Slonaker

Some Corvettes - I think starting in 74 until TBI - came with aluminum low-rise intakes that were an almost exact duplicate of the '5577 manifold. They're in somewhat high demand...so it might be better to eBay 'em

I guess you could look at EGR as enriching the mixture somewhat - but I can't see how that would prevent ping. Interested in his perspective on his experience if you can talk to him a bit.