d = 2 wheel drive/conventional cab
1 = 100 series 1/2 ton
3 = conv cab w/uliline, lo line wagon
b = 6001# to 10000#
e = 318-1 2v v-8
8 = 1978
j = tecumseh road truck (canada)
Made over to dads. He has the books
Curtis
P.S. Can you see if the tags on the rad support. Should be on...