Be sure to run an equal size grounding cable to match your 12V+ cable in every location, especially from battery to starter, to ignition and to both heads. Also, as mentioned a few times above, using an ignition 12v+ cut-off switch to allow the motor to start cranking at full speed before flipping the switch to light it works nicely.
As to your posted question, I have an MSD starter in one of my vehicles. It turned out to be overkill, because once I updated my grounds, even an old junkyard starter cranked my stuff over really well.
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)
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