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68gmsee · 07-28-2018, 05:02 PM

If parts were swapped from different engines that may be the reason. I've had quite a bit of problems with mixing and matching with these GM motors. The best bet is to take everything in front of an engine that already has what you need. This includes all the pulleys, mounting brackets and even the belts so you can get the correct ones. I've even gone so far as to remove the harmonic balancer and pulleys in the past. Good luck.

BTW: I took the liberty of lightening the pic for a better view.

07-28-2018, 05:02 PM	#2
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Pulley misalignment 350. If parts were swapped from different engines that may be the reason. I've had quite a bit of problems with mixing and matching with these GM motors. The best bet is to take everything in front of an engine that already has what you need. This includes all the pulleys, mounting brackets and even the belts so you can get the correct ones. I've even gone so far as to remove the harmonic balancer and pulleys in the past. Good luck. BTW: I took the liberty of lightening the pic for a better view. Attached Images __________________ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...