Manual disc brakes vs power disc brakes questions

I have the 2.75 calipers with the larger rotors on my 64 Sport Fury. I ended up with a 1 1/32 bore MC. I had a 15/16 bore MC onIt, but it didn't move enough fluid. will need the adapter for the 4 bolt to 2 bolt mounting on the aluminum MC. Works fine without a booster. If you want to use the truck calipers, order a MC for a truck with a manual brakes. Probably will need to be at least 1 1/8. Maybe larger if available. I have a push rod on this car without the rubber retainer. Never fell out in 20 years. It's stopped by the brake light switch. I made my own adjustable pushrod.