It's time for me to start looking at some rearends for my 2 69's. So far I have narrowed the decision down to a Currie 9" or a FAB 9 with Strange center and axels. Both cars will be mini tubbed (one running 18x12's/335 tires and the other runnin 19x12's/345 tires). Just trying to get an idea of what length I should order the narrowed rears. Both cars will be using a custom tubular trukarm suspension that I am designing with the help of a friend that used to build NASCAR cars. Any ideas? I was thinking 55 to 56 inches would be enough????