Sorry, just checked back here (forgot you don't automatically get emails from this forum).

I'll do some measuring/checking on my '63 in the next couple days and post back; it's really odd your 16" wheels won't go on. My wheels are Accuride 28177's (IIRC), FWIW.




Some of my crap:
1963 C-30 flatbed dually 292/SM420
1965 C-10 LWB fleet 250/column shift 3 speed
1965 C-30 9' stepside 250/SM420/4.10 gears (my DD)

Website I made for my crap:
http://www.66submarine.com