OK, Helped a freind install toyota 4x4 calipers on the front of his z 6-8 months ago. it has pretty much sat in his garage since then. we installed the 4x4 toyota calipers, 300zx rotors, 280zx master cylinder, and 280z power booster. everything was new. cant get a decent brake pressure, idle surges when the brake is pressed in and this thing has got me totally stumped! i dont know what else to do. it has no air in the lines since i have bled them more than 30 times. help! i did notice that when i tired to bleed the master cylinder, the front reservior bled no fluid when the bleeder was open and the res was full of fluid. could this be the problem? im lost here. wish we had left em stock!