I HAVE A 1964 CHEVELLE SS 4 SPEED. I DO NOT HAVE A DRIVE SHAFT.I HAVE A COUPLE OF DRIVE SHAFTS AVAL. TO ME. ONE IS 54 1/2 inches THE OTHER IS 55 1/2 inches LONG? The LONGER ONE CAMEOUT OF A POWERGLIDE CHEVELLE. THE MEASURE MINTS ARE CENTER OF YOKE TO CENTER OF U-JOINT. IF THESE DO NOT WORK WHAT LENGHT DO I NEED? THANKS JEFF