How strong are the original rear ends in the 1956 150's? Will they stand up to newer engines. I am about to aquire a 56 150, and I am considering putting a 1988 corvette tuned port 350 and a tremec 5-speed in it. Will the original rear end hold up to this combo, or should I consider upgrading it too? Eventually I would like to put a Curry direct replacement 9" in it, but funds won't allow that at this time.Any input would be appreciated.