Originally Posted by Stovebold6
Are the advance diagrams in the manual (mechanical and vacuum) are computed for TDC or already with the ball bearing mark in mind?

Thanks, Frank

They are in addition to any timing set at the base of the distributor, so I guess you'd say TDC.

'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.