Odd thing is, there was a camp back in the day that felt single track rears were safer, and more controllable. Some actually didn't want posi. And if someone ordered it that way, specifically, with a single track, they were a member of that camp (most likely).
Check the 1 min mark on this clip as a prime example:
https://www.youtube.com/watch?v=31JgMAHVeg0
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1970 GTO Judge Tribute Pro-Tour Project 535 IA2
http://forums.maxperformanceinc.com/...d.php?t=760624
1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car
https://forums.maxperformanceinc.com...ght=procharger
Theme Song:
http://www.youtube.com/watch?v=7zKAS...ature=youtu.be