Opinions on posi traction differential

[chevybill]

I am asking for your opinions on which differential unit to buy and a source.

So far, the best buy I have located is on an auburn posi pro unit from jegs.
Powertrax and eaton are a couple of others I have ran across.

The powertrax unit can be installed without removing the ring and pinion (according to jegs customer support).

At this point I am probably going to have to run an automatic th 350 due to cost and I have a 3.73 gear in the rear end presently.

I want to be able to tow with the truck, and would really prefer a 5 spd. manual tranny, but they are very expensive; even used from a salvage yard.

So you thoughts on posi differentials and suppliers, please.

Thanks to everyone