To make a short story long, I am helping a friend who has a 360 with a balance issue. It shakes severely. I had the pan down and it has a stock 360 crankshaft. No sign of internal balancing (Mallory metal). It has the correct B&M flex plate, no weights on the convertor, and a 360 dampener. But I noticed there are three 360 dampeners out there. One with the big weight, one with a scallop machined in the front of the dampener, and one with scallops machined front and back of the dampener. The engine a 1-7-71 casting.

The engine was rebuilt with no miles, but the builder did not install the plate that holds the cam in. Thus no oil pressure. I corrected that and the only damage was scuffing of the rod bearings which I replaced. It carries 75 PSI of oil pressure.

Thanks,
Don