IMO< the pa unit has some very nicely machined features. the brake works fairly well, some problems with creeping. jtp also has extensive machine work and has been building c-4s since the 1800's i think, and Joel's offers a c-4 with some good reviews. the stuff from dynamic is junk. pa has done a good marketing job and offers some form of warranty, the catch is you will need the warranty. c-4s just do not hold up well. sure, lots of people run them, even some really fast (7sec)cars. just look inside their trailer. they carry 8-10 units with them.
if you want the car to be fast, consistent, and free of failures, run a glide. even on pa's web site, they say if you have a lot of hp, you need to run a glide. i know, some of you die hard ford guys would Never run a gm product in your ford. the truth hurts. My specialty is piecing together all the pieces needed for a application like yours, along with convincing the customer to spend his money on something that will last and make their vehicle faster.
pm me if you have questions-rich