Have a booster from Speedway, need to remote mount it. The question being "how long is the input shaft stroke from full out to fully in" ? I need to make a drop in the connector shaft from the floor mounted pedal to the booster to clear the trans mount and attach the end to the threaded booster shaft. I am concerned with how much of the shaft end I can use without interference. Is my question even understandable? I can't push the shaft in by hand as it isn't hooked up and, I assume, I need vacuum.