i am transforming a racecar back to street duties. i have a 727 that was built with a turbo action manual VB with a brake... built together, installed and worked fine. i removed the TA-VB and installed a stock VB with a mancini kickdown cable,(checked and rechecked) now the only gears i have are PARK REVERSE AND FIRST,, it will not shift out of 1.. i tried a second stock VB, same issue.. could the trans. be modified in such a way the stock ones wont work? both stock VB long shelf life unused