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1972 240Z SBC Stock front brakes. Maxima rear calipers 280Z booster Hawk HP pads For the third time, a new Wilwood 1 inch master cylinder has leaked past the rear seal soaking the booster. I had a stock 7/8 inch MC on hand so I thought I would try it . Others have reported that they use a stock 7/8 inch MC with 280ZX rear calipers and that the pedal travel is long and a bit squishy. But since I had the 7/8 inch MC I tought I would give it a try. I removed the residual check valve from the rear brake outlet port of the stock MC. The booster push rod was set right and the reaction disk was epoxied in place (I have lost two). I now make reaction disks by cutting the ends off of rubber stoppers. I bench bled the MC and used a power bleeder while moving the Maxima calipers around to get the air out. Re-bled it after sitting overnight using speed bleeders so I think I got all of the air out. I just got back from a test run with the stock MC/Maxima set up. Not good. The pedal travels about 3/4 the way before effective braking starts and, as others have noted, the pedal feels squishy. I am not comfortable with it, so I'll order another Wilwood 1 inch MC and just plan on checking it often. For the Maxima calipers, the stock MC volume is too small and the 1 inch MC has the right volume, but is too stiff. Actually, the 15/16 MC is probably the best compromise, but NLA. In my Hybrid search I found at least three members who use the 7/8 inch MC with stock fronts and 280ZX/Maxima rear calipers and are happy with the pedal travel and feel.