I bought an electric wiper motor to convert the vacuum wipers on my 1951 1/2 ton stovebolt (6volt). The motor has two speeds with parking. The installation went pretty smoothly although I did have the clearance issue with the choke cable other folks have mentioned. My problem is when you turn them on, they rotate the wrong way. When the wipers are turned on, looking from the front of the truck,the passenger side shaft first rotates clockwise - which would push the wiper down off the windshield. I'm pretty sure I have the arms connected to the motor pins correctly. I think they'll only fit one way: short drivers side on the top pin, and the long passengers side on the bottom pin. I got the motor from Chevy duty (part # 67-064B) and it says it will work on my truck. Am I missing something?