SBP Kelsey Hayes

I have 2 Barracudas with KH 4 piston calipers. Never a problem in probably 20 years. Stainless steel brakes redid them both and I only run Dot 5 silicone brake fluid. My son has a 73 Dart and I have 67 Cuda with the LBP brakes. No problem with them either. I see little advantage brake wise to swapping to LBP brakes. It is expensive to swap everything to the LBP and as far as I can tell the main advantage is availability of parts. As for 4 piston calipers, that is what Vipers ran up to 2002?