Lookin' good Gpineau.
I like the way you solve at a problem.
ie; Break it down into multiple smaller issues, and then find a solution for each.
Couple of thoughts; {Ok, a few}
1: Be sure the threads of the screw pass thru the nylon locking material. {on the nut inside your throttle body}
{If that nut vibrates of, would be a baaaad day}
2: Is the material you used to lengthen the throttle plate strong e'nuff?
3: If you damage a C-10 intake boot, I have spares.
4: With the new injector's will you be going back to an unmodified air box?
{If so, I have one}
Ride safe, Ted
All good questions.
1. I did make sure the screw was long enough to pass through the nylon part of the nut. no chance it will vibrate off. But if it ever did
2. Not sure what you mean. But i will guess your speak of the tab of metal I used to extend the linkage between the the two sets of throttle bodies. Actually the first thing I tried had too much spring to it and I could see that the first set would move slightly before the second set. The solution was a much stiffer steel and I bent a curve into it to increase its stiffness. So it is not flat anymore but is a little dish shaped along its length. If there is a weak point in all this that would be it.
3.Thanks for the offer. Hope I don't need them but I may take you up on it . I don't plan to cut all the way through the boot but to use a drimmel with a stone wheel to hollow out just enough material to allow the injector enough room for the spray to fan out and a straight shot at the intake port.
4. I have some pod filters that I was thinking of using but the rear of the throttle bodies is not round. They are oval and wont easily mate with the filter pods. I did check the rubber boot on the air-box and they can be stretched to fit the throttle bodies. So..Yes I will disassemble the mods I made to the air-box and seal it back up and reuse it. There is a port on the bottom of the air-box to vent the crank case that i think is still useful. And the air box is where I mounted the intake air temperature sensor.
Being under a stay at home order makes for a lot of idle time to rethink some things and contemplate on how it could be done better. I really think my original design works well and changing to the smaller injectors would solve the issue of surging at low speed. But since I had the throttle body sitting right in front of me I said "why not?" . ( I actually purchased the injectors but they came with the throttle body attached...lol)