You've got a Jobmaster 6000..The 'C' designator didn't come out until the 60's..Original engine is a 261..there should be a number stamped next to the distributor that will tell you the engine size..to identify the 2spd rear end, there should be a tag on it with numbers..


Geoff


68 GMC 3800
56 JD420C w/JD90 Loader