79 diva, i was worried too, believe me, i just put 7 grand in this motor last year and i was so worried when i was taking it apart. i thought i got away with just hte gaskets but the cimbustion chamber was whacked out but liek i said $1200 for new heads beats alot of the other stuff that couldve gone wrong.
zz4's also used a hyper piston if i remmeber correctly, and theyre parts are good from gm with what htey have in them but theyre far from aftermarket stuff. when you grenaded that were you spraying it?
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