Universal Traction Bars install on a Duster....

Custom slappers (like the Lakewoods), and a line-loc, were the only part on my 340car in 71 that wasn't stock, and she did pretty good with those and the OEM E70-14s. In 72, she got 4.10s and in hi-school was the car to beat. I used to put the line-loc on at red-lites and slip the clutch in and out, to freak out the folks in the next lanes as the back end went up and down, and the U-joints (I guess) made strange creaking sounds. Yeah we had fun.