Balancing

If the machine shop balanced it without the "hatchet" that goes behind the balancer, adding it now would put it out of balance.

The problem is, "is there enough weight on a C-6 flexplate to copy what I assume was a manual tranny flywheel"

If they didnt touch anything else and only did the flywheel, AND you know it is an SCJ, you may be able to go with a 428 flexplate and SCJ hatchet, but its a guess at this point, we dont know exactly what the machinist did


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- 70 Fastback Mustang, 489 cid FE, TKO-600 5 speed, 3.70 9 inch
- 71 F100 shortbed 4x4, 397 cid FE, headers, Street Dominator, 280H, 5 lug Dana 60, 4 speed