Rob Bonney Fabrication 1967-72 K20 frame boxing set, designed to be used in conjunction with our Cummins Motor mounting Kits.  Plates are cut and formed from 1/8" cold roll steel, and includes machined dom sleeves and gr. 8 hardware for the steering box.  Welding and fabrication REQUIRED!  Factory front crossmember will need to be replaced with rectangular tubing.  We are currently using our 73-87 Cummins motor mounting plates in the 67-72 trucks, minor trimming of the 1/4 steel is required on the frame mounting plates to fit in that application.   Made in the USA!