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Help with serp. Belt 496

I have a mag 496 that I bought for a core rebuild..I am done with rebuild and putting the serpentine belt on the automatic tensioner. Will not fit a little to small need longer one..
The motors do not have trim pumps.

Dealer sent Belt number 57-865615002
It looks like it calls for a 57-865635002

Does anybody know what belt really fits. NO trim pump/steering pump on this motor.

I'm just posting this here for search bar. I think I found it

[ATTACH=CONFIG]520397[/ATTACH]

Quote:

Originally Posted by fastestonehere (Post 4090496)

I have a steering pump, but its very simple, grab some string, wrap it around the serp path, add some load the tensioner, cut the string end to end and measure it. I buy my Serpentine belts and the auto parts store, the inch length is in the part numbers.