I have most recently replaced the 88' cast iron rear calipers with the aluminum PBR setup. Well my brakes still suck. The rear wheels still will not hold while in drive and on stands (pressing as hard as i can). Well I have heard that the master cylinder from the 88'(J65) and earlier disc brake setup was different from the 89' and later setup requiring a (J50) disc/drum master cylinder. I have just most recently purchased one. Well the question is while i am bench bleeding the foward most hole does not squirt hardly any brake fluid as the rear most hole does squirt ALOT of fluid. Well is this the way these master cylinders were desinged? If anyone knows what i am missing here and might know what the hell is wrong with my brakes, please let me know. thnaks for any help. let the bonfire begin!!!

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86',88',89' IROC-Z, 350 TPI, 700-R4