when I rebuilt my 84 305 h.o. I took its low miled good running 700r drained the converter and the entire trans of fluid, put in a b/m shift kit, didnt fill the converter up on installation, filled the trans up had the car on jacks got it to go throught the foward gears good now but it takes more rpm than normal to make it move in reverse, should i continue with the process of running it on jacks and letting the pump get the converter totally filled?