red58,
The Clark Transmissions were only used on the 70 & 80 Series trucks. The 60 Series (which oldtek88 has) used the New Process and the 90 & 100's used the Spicer transmissions.
oldtek88,
Those rims are the "widow makers" which should be replaced with either a lock ring 20" tube type wheel or a 22.5" tubeless wheel.
Happy New Year!
Mike B
