Man, don't beat yourself up so bad. Good points on the whys and wherefores we didn't get one kit or another. Safe bet there are others with similar stories. Mine was just not being in country. I didn't miss the '28 Model A MPC / AMT.
Not a Big Rig modeler, but the subject caught my attention. Got me thinkin' of "Giddy Up Go " also. seems like there were a few more along the lines of "309". My Dads brother was a truck driver outta north west Ohio, run for a bunch of Truck Farms and Campbell Soup.
Here's a look at the instructions.http://public.fotki.com/drasticplasticsmcc/mkiba-build-under-c/johan-instructions/straightline-competition/johan-haulin-hearse-/ A couple a finer HEMIs you'll never find.