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I'm not seeing anything that looks like the head gasket failed. There may be a crack by the lower bolt hole in the last couple of pictures. It doesn't look like it made it to the water jacket though. Might be worth knocking a freeze plug out and looking inside with a bore scope. Have your machine shop magnaflux it.
Bob
tufcj
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I thought the same thing. Heads are 3220502-2
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1 Attachment(s)
Attachment 539
Can you see this crack? Running 45°
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Yep. Right down from that nice square edge in the casting. Typical.
Bob
tufcj
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1 Attachment(s)
Attachment 540
Now to find a 502 head! Thanks for the help guys
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Do you guys know if I need to match the 502-2 heads? Or will other heads match up ok with my other head?
Shawn
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Guy in town will only sell me a pair, wants $225. Surely I've got to find a better price?
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It doesn't need to be a 502. All of the bridged rocker heads back to about 1974 are basically the same. 73 and earlier heads used individual rockers and screw in studs like a Chevy. My guess is that your machine shop missed that crack. Maybe you can get some relief from them on the work on the replacement.
Bob
tufcj