Originally Posted by Gdads51
Bill, Whats the diameter of the existing pulley on your 10si???

OD is 2.600" and the top surface of the V-belt is riding about 0.067" proud of the pulley.



Originally Posted by Hotrod Lincoln
It would be simpler to use a bigger crankshaft pulley

Jerry: How would pulling the engine to change out the crank pulley be easier than swapping the alternator pulley?

'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.