I'm working on putting a nv4500 into my 80 model dually that I tow my dragcar and jeep with. I have factory bellhousing,slave,m/c combination on it for a 92 model. I mounted the m/c to the firewall where I measured off of a 85 that had factory hydro setup. My pedal is really hard to push. Could I still have air in the system or do I have the m/c mounted wrong and not getting enough leverage out of the pedal?