Questions for you. Since 72 was first year for unleaded, why the 84 heads? Not sure but don't think there is a problem here. Second, the cranks are different? Please elaborate. I thought it was ballancers and flywheels. I know 84 blocks won't have the bell crank stud for manual clutch, but since you are using the 73 block I don't see a problem here. Anyone else.
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