I am in the process of restoring an old original set of Traction Masters for my '57. It has the cast iron rear bracket. No front bracket. Easy enough to make but I would like to know the distance from the frame to the center of the thru bolt on the front mount. Anyone out there have an original set? Getting the bushings from Traction Master but they were no help on the spec's for the front mount. They will sell me them for $40 though.