I had a similar noise with my ‘52 SM318, and it turned out to be the bearing on the input shaft. I changed that and the pilot bearing and the noise went away.


Phil
Moderator, The Engine Shop, Interiors and Project Journals

1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube
Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes
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