Stubborn starting question...

Go with either an MSD billet distributor or HEI conversion. Davis Unified Ignition (or DUI) make some good units. I would not go the crap-tronix route. I have had too many people come back when the module over heats and burns out. It's susceptible to heat soak. Same with their flame thrower coils. They either go intermittent or just up and quit.
From Mopars to vintage volkswagens, I've had issues with the drop in modules and coils across the board with per tronix. I try and push either MSD or DUI distributors. There are several others out there as well just check out summit racing and their available products. Be careful with eBay as MSD and others seem to have a lot of counterfeits out there lately and you can't be sure of what your actually getting under the MSD looking case.............