[jhowes]

I ran 2 updraft tillotsons with large intake valves , a reground touring cam(?) and a 5.9 head. It had plenty of power for the hills but this does not increase the touring speed. That requires gearing and there are plenty of posts on which way to go with rear end gears, overdrives, 4 speed transmissions and the like. They do require a strong engine, but my personal opinion is it does not require the dual carbs that you are thinking about and they are a pain in the neck to sync. Jack