I believe all the 3/4 ton AD trucks had open drive lines-- 55 first series was the first open one for 1/2 tons. Check for the Chevy manuals online (Tech tips area?).
Come on, guys, help me out here. I think the person doing the manuals is Kevin Hardy?????
WHOOOPS___ it is Keith, not Kevin.
PS- Keith, please forgive me - it's the fuzzy old brain__ sorry!