
04-05-2022, 09:04 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
And before you start yanking the intake and heads off, give the old cooling system tablets a try. They really do work... sometimes.  But they're a lot easier than yanking the heads off.
https://www.amazon.com/Genuine-GM-12.../dp/B000QIH3C4

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