posi, limited slip, open

[kevncar]

I am going to convert the rearend of my 67 over to 5-lug axles and thought while I was in there I might upgrade the rearend to a posi. My question is what is the difference and what should I be shopping for?

My truck is a toy, meaning I don't commute in it or anything, but I want the wife to be able to use it as a back up if something was to happen to one of our daily drivers. I also might try towing a boat or maybe a car trailer every once in a blue moon. Other than that, ITS A BURNOUT MACHINE!!!

From friends I get everything from "leave it alone" to "put a spool in it, or weld the spider gears"

Looking for that good advice I always get here. Maybe even some idea of brands and what I should expect to pay.

Thanks guys and gals