Need Help W/ I.D.

I checked the rear ratio today. It seems to be a 4.10, not the 4.63's(?) the previous owner claimed. It has 10" brakes, which is ok cuz they're lighter than the 11's I thought it had.
The axles are aftermarket, but I don't know what brand. There's no I.D. on the end. When I disassemble the rear, I'll look for a brand name and, look to see if it's a spool or a Sure Grip (Ford calls them "Limited Slip", maybe?)
I scribed a line on the balancer at 35*. I'm going to put new plugs in it, then see where the timing is. I may also need to drill another .001" out of the idle feed restrictions. Depends on how the timing is. Previously, I opened them .002", and it went from not idling, to idling pretty solid.
I'm just fiddling w/ it. When it's running right, I'm going to look inside and see what it's got.
I want to get the whole truck apart and get rid of it. I have too much stuff around!