I've witnessed some really fast Mopars on slapper bars, most that think they don't work don't understand them or know how to dial them in, there old technology but they worked, chevies have "nothing" to do with it.
I agree Joe. Stiffen the front half and let the back half work. Although the front to back ratio does favor the Mopar springs without a traction device. Stock Mopar springs can take way more then a F-body GM or Ford can.