7.25 posi??

So I took the 7.25 out of my 66' canadian 2dr post valiant 225 3spd manual..

And to my suprize the rear was a posi.. I didnt gear as far as to read the gearing tag but I always had a hunch.. ya know.. it felt like a posi.. I couldnt do burnouts.. and it was always hard to feather it out.. and it ALWAYS had traction...

Anyone else have one? is this a popular thing for 7.25?
lemme know what you think...
I mean. I was suprized , ill have to look into that.. and ill let you know what gears it has.. and maybe I might keep it instead of selling it..

Cerwin