I just ordered a Milodon 16285 w/pump for the 455 I'm having built. According to Milodon's site, that pump measures a hub height of 5 31/32". The factory pump measurement I came up with are 5.072" (non-a/c), 5.572" (68-70 with a/c) or 6.072" (71-76 with a/c), and that measurement is "to the hub". I need to determine the comparable height of the Milodon pump so I can source the correct pulleys.

The 455 didn't come with pulleys, so I'm in search of a set for an a/c application and wondering what to look for. The engine that's being replaced is a non a/c application, so those pulleys are useless.

Has anyone used this pump on an a/c application, and if so, were there any alignment issues with your pulleys? What year and model do you have?

I went thru pulley alignment issues on a big block installation in a '67 Nova because of the use of a motor plate and am trying to head off any issues up front.

Thanks for any insight you can provide...

 

That's a 6" (long) Olds water pump. even it it really is 1/32" short, you'll never see that in belt alignment.

 

Thought so but have learned to take nothing for granted...

So I need to find a set of pulleys from 1971 thru 1976, correct?