Nice looking J4000 you've got there. I applaud your choice in keeping the original motor. Who ever did your seat did a very nice job. It looks great, and could pass for stock.
1975 Chevy K20 8400lb GVW Camper Special
1971 Gladiator J2000 Platform-Stake Dump 350/T18
1970 Gladiator J3000 3407Z Camper Truck 350/T18
1963 Gladiator J300 Townside 350/TH400