Dana 60 swap, what should I be on the lookout for??

Good morning,

Well after much deliberation on narrowing up a second 8.75 for use with my new wheels and tires, I have decided to swap over to a Dana 60.

My friend owns a wrecking yard and is a Ford guy, there are piles of older 3/4ton trucks and large vans there, many with Dana 60's under them. I am hoping to find one with 3.73 gears and the Trac Lok limited slip in it.

Is there anything in particular I should be looking for, or avoiding? I plan to use B body brakes and axles from Dr. Diff. Is it correct the factory Trac Lok's are only good for about 400HP?

Thanks for the help FABO.