need some help here

[enjenjo]

What is the axle flange to axle flange measurement of an Astro van rear end?

[Uncle Bob]

In the event nobody has a ready answer the listed rear track is 65.1", but I couldn't find a quick reference for stock wheel offset.  Perhaps you could call a tire/wheel guy and they'd have a ready reference so you could calc back from that.

[GPster]

Well I went to the corner used car lot and they had one but nobody was around to convince  to put it on the lift and pull the rear tires off. It had aftermarket wheels on it so I could measure from the outside of the tire width to the brake drum. Using that (the ridge on the drum edge feels to be about the same as the raised part for the axel flange) I come up with 66". I'd be careful, a lot of these things are used for handicapped access or high top campers and they might be where that spare tire with 2 bolt patterns comes from so they may not all have the same rear end under them. GPster

[enjenjo]

Well, it looks like it's too wide to serve my purpose. I know that a 79 or so GM full size will work, but it's hard to find one around here..