[dennislbrooks]

The bolt is the stock - 67 ----maybe 65-72. If you use this oem shouldered bolt, the eyelet hole will need enlarged. The rod end came with the hydroboost -- I extended it to 8.5" from the firewall mount. Or you could use the oem existing rod to extend and leave it adjustable. I also suggest that you redrill the brake arm hole down toward the floor about 1/2" lower, this will give you more travel and brakes that are very close to the top. You could mark this new hole by measuring your new extended rod -- do not preload the hydroboost. Drilling is a lot easier with the brake arm removed --a good time is if you are doing column work sometime. If you error a bit, the bump stop can be trimmed. If you do not redrill the brake arm at all --braking will be fine---you lose an inch of pedal.