Agree with getting a machine shop to do it properly. I had the heads done "back in the day" when the iron heads were decked on my 440.
I'm just curious...anybody ever use Seal-All? Literally 45 years ago, I had a car with a coil spring decide to hop out of its perch and poke a hole in the gas tank. Wiped it off, lathered some Seal-All on it, and it never leaked again for the 5 more years we had the car. Just curious as it's mentioned nothing really stands up to gasoline.
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