That's VERY interesting, Bill. My daily driver right now is my '65 C-30, it has 4.10's, an SM420, and a two barrel 283. I'm running slightly taller 7.50-17's on the back, but it will run 60-65MPH really easy. If I dropped the hammer I'd be surprised if it wouldn't run 90MPH or so.
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 
