There are several YouTube videos that show various stages of disassembly/inspection/reassembly. Some are rather long so I didn’t watch them thru. You may find what your looking for. Do a search on “SM420’ and it will bring up several. Good luck!


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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