Mike Davis & Straycat both mention a factory rear sway bar with boxed lower control arms that have teflon or polyurethane bushings in them along with the braces are very helpful for better traction due to stiffening the chassis distributing the load more evenly to the rear tires. The '70 Tempest I mentioned does have all the above (not so sure about the bushings though...can't see them) and I'm sure that's why it went high 11's without wheel-hop and had good 60' times (1.6's with the drag radials). It doesn't have the hop-stop bars however.
Dennis
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