This is the finished process, I had made carburetor changes many times, I went from a ford escort weber to a ford 2 bbl to a 140 cid 6 cyl holley 1904 1bbl, and now finally a 1920 holley 1 bbl from a 223cid jeep from 1965. The 1904 holley worked good but the venturi was smaller than an inch and had the choke plate as part of venturi, it had good low end torque but ran out of air at about 5500 rpm. about 65mph and it wold climb very slowly to about 70mph and then was done. Now with the holley 1920, its throttle plate was large and the venturi was as large with a crucifix type booster. I bet I could drop an american dollar down threw the venturi. I was not thinking it would work, my surprise was how good it worked once the plenum got up to temperature with oil heat. very nice bottom end torque, no hesitation even good roll on in high gear thats with the power valve in operation, with power valve blocked it would hesitate. So this carb is using all its circuits. Now up to about 6500 rpm and this carb is finished, I could run it to about 75mph. Now I have come to the conclusion that my 1 inch diameter runners are chocking the system down, Now I am thinking going to an 1 1/4 inch piping and use an open plenum instead of a divided plenum What worries me that if I go with larger runners and an open plenum instead of a divided plenum, will I loose the high velocity that I have now with the small diameter runners and make the 1920 carb not work. My other thought is to go back to the weber. I still look at this as a success because in the rev range that the bike works it works very well. you would be hard pressed to know that it had one carb.I used 1959 cadilac tail lights and model t cowl oil lamps and converted them to an 1156 bulb. rear signal lights are 39 chev and horns are 69 roadrunner, f#$king loud. The sissy bar is a noose and twisted square iron with scull medallion,. Made by a guy in your country, talented guy Any way thanks for the help