I just put wilwood 6 pistons in front and 4 pistons in rear. I used the calculator to figure out the correct master cylinders for each. 3/16 steel line with braided lines at calipers. Wilwood bias valve hooked to rear M/C. I can not stop the rear wheels. I had it on jack stands with no wheels, idling in 1st gear and it takes all the leg pressure I have to stop the axle from spinning. I understand that the pads need to heat up to work well but I should be able to stop a spinning axle with minimum effort. Pedal is solid. Blead the brakes forward and backward (literally). Any ideas?