I just bought a Custom Autosound radio from Classic Parts (Chevy Duty) for my 57 3100. The radio is nearly 8 inches deep from dash face to back of the big pigtail. It is only 5 1/2 inches from dash face to the wiper motor. The wipers and motor work fine, but I suspect the motor is not original. It is a Delco unit, and some of the mounting bolts fit the original holes in the body, but some of the brackets look very home-made. I just acquired a pair of transmission arms from a 57 with vacuum motor, and they aren't the same as what is in my truck. Furthermore, my arms have been bent a little in addition to the weird bends done at the factory. The wiper motor in my truck is mounted parallel with the drive shaft, whereas replacement motors shown in the Classic Parts and LMC catalogs show the wiper motors mounted perpendicular to the drive shaft, which would give more room behind the dash. Sorry this has become more of a wiper question than radio, but I don't wish to make a wiper problem in addition to a radio problem. Is it possible I have an OEM electic motor from a 58 or 59, whereby some of the mounting holes line up and some don't, and the arms are the same length as the 57, but bent a little different ?? If I order a new wiper motor through the catalog, will my radion fit??
Thanks in advance for your help.
