Re: why do I need alternator spacer for water pump on 69 ss 350
the long water pump came out in 68 in some cars, and 69 in everything but trucks. it was a nice and clean setup that is easy to work with.
they changed the upper alt mount for 76 for reasons only known to the GM engineers, and i think they also changed the PS pump mounting boss at that same time so they could use the overly complex mounting setup with 3 bolts to hold belt tension- one of which is behind the pump and almost impossible to get at.
then sometime in the early 80's they changed things again, and when they started using reverse rotation pumps in serpentine setups, they got rid of the alt and PS mounting bosses altogether, and some cars and trucks even got rid of the threaded hole for the heater hose.
if you go to NAPA or any decent parts store locally, you can get the correct pump for your year for about $40, and then hopefully you have the correct upper alt bracket to go with it. or you could just go find a later model upper alt bracket in the junkyard for a few bucks if you really want to get rid of that spacer.
you don't plan sincerity.
you have to make it up on the spot.
wanna hear about 20 years ago when i was too smart to know any better?