Ha ha, just had to make a 60's joke out of that. I AM confused though. I just bought my '68 400 and am trying to make heads or tails of what I've got here. I asked the guy who had it if it had a POSI rear and he said "No, it's a limited slip differential." Isn't that the same thing??? Or not always? It's supposed to be somewhere between 3.16 and 3.26 (he wasn't POSItive but just said he knows it tachs 3000 at 70mph which is true).

Thanks for answering a dumb chick question, ha ha!