There was only one size for the 32 passenger and pickup. This fits the heavy axel. ModelA had the 2.25 spread and 32-34 had the 2.00 I believe the 35 and up returned to the 2.25 but these wishbones have the spring mounted suicide style (ahead of axel) this style continued thru 48. I have a set of nice 32 bones but are split and are about 24inches long would need blasting and some filler primer to be mint If you need to lengthen you could buy heavy walled rectangular tubing at a steel supply house. I have done this on several street rods i'v built. I'll take $125.00 plus shipping for them, If interested pm me Thanks Pete