coil spring front

" will be used for street and strip im looking at getting rid of the bars for hedder clearance" and THIS makes all the difference in the world when it comes to the best answer. So many times I see these threads and somebody has to ask "what is the intended usage and expectations" and/or "how much do you want to change your car from stock" whether for looks or historic or monetary value.
I have to admit though, as soon as I saw this thread title I thought somebody might be intentionally trying to elicit an answer from 72 in order to get OldMan going again.

I was all but ready to order the complete RMS system, & I still really like what Bill is doing, but I'm glad I saw that video back then
This is the part that sold me on the validity - the TireRack track, using the TireRack test driver, - faster lap times with that 4-door B body than with a 3-series BMW that he drives for a living (on that very track no less)
It would be a different story if it was a guy that had been putting (a lot) of laps strictly in a mopar up against somebody in a BMW, but those facts above are huge. Not that a 3 series is the end all be all, but it is a pretty high bar compared to a 50+ year old domestic car that was never intended to be a sports car.