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Re: Testing 454 Heads for Leaks with WATER?
I think he's looking at valve condition vs cracks. You can use that test to get a reasonable idea of condition. If they weep a little, you can still lap them when you throw a set of valve seals on before you install.
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72 GMC C2500 402/Th400 first truck (still have)
77 GMC C3500 CC dually Sold 
70 C50 dump truck "Rusty"
87 K10 Suburban Sold
93 K2500 xcab 6.5TD
96 GMC K2500 Suburban 6.5 TD
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