The ARP's are nice because you are not supposed to reuse the stock bolts. The stockers are torque to yield bolts, and you have to have a monster metric Allen wrench adapter. The ARP's can be reused, and are 12 point bolts. I guess it depends on how often you will have to take off the flexplate. It also helps to have the Kent Moore flywheel tool to keep it from rotating when you are loosening and tightening the flywheel bolts.
As for the BD plate, I can't say specifically, mine is from SoCal and it is 29.3, however it was a tight fit getting the converter pilot into the new plate.
As for the BD plate, I can't say specifically, mine is from SoCal and it is 29.3, however it was a tight fit getting the converter pilot into the new plate.