depends on if you want a "toy" or working truck.
toy = 67-68 chev sb 327, turbo 400, AC, 3.73 posi, dark pastel blue, white cab top (small back window 67 1st choice) - best looking imo
work = 06 gmc SLT (full load) crew cab sb, LBZ, 6sp Allison, G80, white. (summit)
both stock, lots of parts, repo and original.
toy = 67-68 chev sb 327, turbo 400, AC, 3.73 posi, dark pastel blue, white cab top (small back window 67 1st choice) - best looking imo
work = 06 gmc SLT (full load) crew cab sb, LBZ, 6sp Allison, G80, white. (summit)
both stock, lots of parts, repo and original.