Re: Posi units.
The Strange S60 with the S-trac helical posi is just as strong as a wavetrac from what I've read. Don't have any personal experience with either (yet).
Here's a nice thread about the S-trac and wavetrac :
Just bought an S60 with the S-trac and as far as looks go, looks a lot better than a 9" to me LOL
67 Chevelle convertible, 138 vin, original 4 speed, bucket seats, Marina Blue with black interior