1966 Dart torsion bar info needed

dont get new unless your set on new 6 bars. Plenty of them should be on here as many go from 6 to 8 and thats the first conversion piece they pitch into the scrap pile.

A-body 35.8" 0.810" 90 P5249148 Drag Racing
A-body 35.8" 0.830" 100 N/A 6-cyl. Production bar
What company would sale the A body drag bars u mentioned?
Thanks Chris