Well holy shiitake sauce, it must be a trac-lok. I just laid down two 70 - 80 foot burnouts and got the skid pictures to show it. Not only that, but I jacked up the rearend and turned either wheel and the opposite wheel did NOT turn.
I positively remember turning one and the other rotating the opposite way before. However, that must have been before I put in the 3.89. So the guy who sold me the current pumpkin was mistaken and he sold me a trac-lok. That would explain a lot of things. For one, the old 390 felt powerful enough, but it would barely spin the cheater slicks, which at the time I thought was a one wheel wonder. That was because the clutch was stock, and the rear end was a trac-lok.
Man, I'm sorry to have bothered everyone with yet another rookie mistake.
I'm guessing that, because the one wheel will turn (while jacked up and out of gear) and the other doesn't reverse, then I must have the clutch type thingy in there - would that be correct?
Dave J