Hy BlackViking60, that's quite a rare truck you have found. GMCs of that size and vintage were either equipped with Dayton or Motor wheels. Your new truck obviously doesn't have Daytons, so it probably has Motor wheels. Motor wheels are a hub piloted wheel which use a retaining nut with a large washer. Your new truck probably has a Clark transmission. Good luck with your project.
Do you happen to know the bolt pattern on these motor wheels?
Thanks and any idea where i find the # on the clark so i know which one it is? Thanks
