Re: True Track
I don't think that the Truetrac ever locks completely. It's gear driven, so it "senses" wheel slip or something like that and adjusts accordingly.
The Powerlok was a front locking option on some Scout Front Dana 30's and is a good limited slip because it uses all metal clutch disks.
I think either one would be fine for front steering in 4wd. I'm actually putting a Torsen in my front Dana 30, which I understand are junk and pretty weak, but I'll see how far the $70 will go.
1978 CJ-5 258 Weber, 'glass body