head question!

93rangerT

Registered User
just had my heads tanked and fluxed. there was a crack along the flange on the outside. its a 94, is there a difference between early heads and late heads?
 
I think the only difference is how they where heat treated. All I know is the 94-95 where more likely to crack.
 
so since the only difference is how they were heat treated, i could run one 93 head and one 94 with no issues?
 
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