1200 psi should be enough to lock all 4 wheels up. Are your brake lines rubber stock & new? If they're stock or old I'd replace them with some new braided lines. They can look good to the eye & be bad with 900-1200 psi they can bulge with that much pressure causing to much travel on the brake pedal (just my opinion from having it happen) I put new brake 4 or 5 layer braided lines on front and back last summer made a huge difference in how the pedal felt.
I pm'd Zray yesterday about pads his opinion is the Porterfield 4r-s were better than the red stuff EBC but not much for the price difference.
I have EBC slotted & drilled rotors with some kind of aftermarket black pads from the previous owner wearing a groove in the rotors. I found my ball micrometer yesterday and have enough to turn the rotors once.
I ordered the red stuff EBC pads from AZ yesterday they're special ordered 24-48 hrs to get them for about $40 cheaper than anyone else online. I'll be getting the rotors turned in the next couple weeks.
69 Coupe 351W C4 Holley Street Avenger Comp Cams Roller Noisy Gear Drive
Cad ATS V
Some previous cars: 68 Shelby GT500 428 Auto, 40 Chev Coupe 283, 47 Fiat Topolino B/A Chev 288 Hilborn, 64 Plymouth 426 Hemi SS/BA, 70 & 71 Cuda & Challenger 426 Hemi SS/AA, 55 Chev 327, 55 Chev Nomad 283, 57 Chev Nomad 327,
57 Pontiac Safari 389, 63 Corvette 327, 68 Cougar XR7 302, 68 Camaro RS/SS 327
69 Camaro Z28 396, 73 Olds Cutlass Supreme 455 4 sp