Do a compression test and post the results. Check for vacuum leaks and eliminate them if found. Re-curve the distributor for less mechanical advance, so you can run more initial timing and not exceed 36 degrees total.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
