Lost power assist !!!! 1970 GMC Truck
My 1970 GMC C10 With a 1985 305 CI form a Monty Carlo. Had a Cast iron Manifold and a 2-barrel carb. I change the intake manifold and Carb to a Ofenhowzer (how ever it is spelled) and a 60 model 4 barrel carb I also changed the points dist to a HEI in the process I lost the power assist for my brakes! I have hooked the line to the same port on the back of the carb and to the port in the back of the manifold. If I drive a good distance without using the brakes it builds up some but goes away instantly when I press the brakes. is the 4 barrel lowing the vac enough that it is killing the brakes? If I plug the ports with my finger I feel vac so I know it is getting there. What is the line that runs to the trans is this for the shift timing? Because the trans seems to shift fine. <img src="graemlins/crash.gif" border="0" alt="[crash]" /> HELP no brakes SUXS!!!!!!!