Performance disk brakes for 1965 C10 HELP

[mastatikle]

Hello all, I have a 1965 C10 and it currently has disk brakes from a 1988 gm truck or suv I believe. Im saying this because there is an 88 stamped on the caliper on the driver side. I'm not sure if that's accurate or not I just know 1988 gm trucks and suv's also had 6 lug. Anyway this truck currently has a little more power than the original drivetrain and the current brake setup isn't too strong or isn't strong enough for me. As the motor is breaking in more power is being found and it's getting scarier to drive it. I am constantly slowing down way before a stop sign or car because I don't want to take the risk. I bought a new master cylinder because the old one was leaking but that only helped a bit. I wanted to know if anyone has a performance brake set up with 6 lugs. I want to keep the original rims. I was looking into buying universal calipers and creating a bracket but I'm not sure how possible that is. It's winter now and I want to get it done soon. Any help is great. Thanks.