Easiest/Cheapest way to a 4bbl 318?

Johnny Dart said

You can buy a posi,but it wont fit.......

Do what Ma Mopar does,and throw in a Sure Grip......

Car will be much happier that way ...........8)

Click to expand...

Well, when I said "posi" I meant "Sure Grip". Aren't they different names for the same thing? Limited slip units right?

Now that I see your smiley I think maybe you are just F-ing with me.