Sounds fun. Why the short 6.7 rod length? Low deck? How would the motor respond to a 7.1 rod. I ask because the differences in rod length/rod ratio are not so clear in my mind. It would be nice to hear some info on the choices.

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)