Mopar Torsion bar length chart

Vehicle Length Diameter Rate Part no. Mopar adv. application
A-body 35.8" 0.810" 90 P5249148 Drag Racing
A-body 35.8" 0.830" 100 N/A 6-cyl. Production bar
A-body 340 35.8" 0.870" 120 P5249149 Resto 340
A-body 383 35.8" 0.890" 130 P5249150 Resto 383
A-body 35.8" 0.920" 150 P5249151 HD V8; Handling Std. Solo
A-body 35.8" 0.990" 200 P5249152 Solo and Road Racing
A-body 35.8" 1.040" 250 P5249153 HD Solo and Road racing; Oval Track Racing
A-body 35.8" 1.080" 300 P5249154 Oval Track 1/4 and 1/2 Mile racing (Optional)
A-body 35.8" 1.140" 350 P5248155 Oval Track 1/4 and 1/2 Mile racing
B/E body 41" 0.840" 80 P5249156 Drag Racing
B/E body 41" 0.860" 90 N/A 6-cyl production bar
B/E body 41" 0.920" 115 P5249157 Resto 440/Hemi
B/E body 41" 0.960" 135 P5249158 HD V8 Handling
B/E body 41" 1.000" 160 P5249159 Solo and Road Racing
B/E body 41" 1.120" 250 P5249160 HD Solo and Road Racing; Oval Track 1/4 and 1/2 Mile Racing
B/E body 41" 1.160" 300 P5249161 Oval Track 1/4 and 1/2 Mile Racing (Optional Std. and Racing)
B/E body 41" 1.220" 350 P5249162 HD Oval Track 1/4 and 1/2 Mile Racing; Std.

Personal note;
Above table is based on roughly 30 year old information, which was considered on par with the times.
But, in my opinion, these days, normal “modern day” streethandling make torsion bar rates of 200+ pretty much the ‘default’ application for V8 powered A-B-E body Mopars.
Improved shock technology, needed with thicker torsion bars, upgrade the handling of a ’60s/’70s Mopar greatly.

Mopar Torsion Bars 1969 Dodge Dart Dodge Demon Plymouth Roadrunner Dodge Challenger Dodge Challenger Plymouth cuda Plymouth Cuda Plymouth Valiant Dodge Challenger