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Re: Doing a lower intake on GM 3.1/3.4? Please check this
Posted to Technical Discussion Forum on 8/28/2007

Checking the intake sealing surface of the heads (where it attaches to the intake), there isn't .002 gap anywhere. Granted, this is with the heads still on so it's hard to get a perfect check.

Car only has 43,000 miles, never overheated (according to owner).... Login to read more.