I checked again and the tube Tom Langdon ran for heated water is on the back of the intake main "log" at the bottom. It would work if you did it that way. Tom could fix that up for you.
It would be an attention getter on your truck.
Be sure the rear carb doesn't interfere with anything. The intake and the rear carb get real close to the firewall and possibly the shifting linkage. The carb may clear the firewall, but an air cleaner might not fit on the carb without hitting the firewall. :confused:
Joe