Skip White distributor... Only "1 sold" on eBay (?)
There's been a tremendous amount of discussion about these on here, I'd do a search
I've forgotten, what kind of module they use, IE it is not a GM HEI but similar. Holden? or something? I forget.
One big "thing" I have with stuff like this, or Pertronix, is "if it quits." You just about need to buy two to have a spare.
I run what amounts to a factory Mopar breakerless distributor, so, "available anywhere" and I've already got "some." I use a GM HEI module, available at any parts store. Nearly as available is the original "type" Mopar ECU
The great thing about running a GM HEI is that the "seem" to be a bit better quality than typical replacement Mopar ECUs, and you don't need a ballast. Even with a factory coil, you get a hotter spark
Similar thread:
http://www.forabodiesonly.com/mopar/showthread.php?t=282633