ok, so at my local u pull, theres a 69 f-250 with a dana 60, would this be a good find?

 

rear 60's are a dime a dozen. its likely to be a 16 or 30 spline. either way if you are going through the trouble of building a 60 you will want to convert it to 35 spline. otherwise you have the same size shafts as a 44 or smaller

 

Rear D60's can be had all day long for under 200. As a matter of fact... I just gave one away cause it was in my way.

As for boring it out for 35 spline, Around where I live that cost 250, plus the cost of new axle shafts, which I think is around 100 per side. OR you can go the easy route and just swap in a 14bolt FF