1960-62 K1000 frame GMC J-N Series
1960-63 K10 frame ( In 1964 the motor was no longer supported by the front crossmember.)
Rear shocks were mounted parallel to the frame in 64 as compared to the V style of the earlier years.
The drag link between the steering box and axle changed from a ball type setup inside a tube to a cast tie rod setup.
