318 1/8 time improvement

No, traction bars and old Mopars don't mix well. A cheap alternative is a pinion snubber and some drag shocks.

Good news is (at least according to Wallace) your ET/MPH line up.
60' to 1/4 Mile Calculator - Wallace Racing
Not necessary true I had t bars on my 340 clone with basically the same parts
Exc posi and more intake and a 450 lift cam won’t say they cured the traction but they did hellp a lot !! I don’t care if they don’t work well and being old school
I remember seeing bars on many card
It was kind of a status symbol and on my 70 Dart will have chrome side pipes
Chrome t bars, chrome bumpers, chrome
Air cleaner, chrome bumblebee stripe, chrome valve covers, custom chrome dash with 20 gauges and so forth