Ok the mikuni arm will definately fit on the weber. Problem is the arm that connects to the choke is difficult to modify without binding the linkage. I'm going to try using some aluminum fencing ties and see if it's strong enough hold it's shape. So far I've drilled a hole in the mikuni arm about where the weber arm has it's hole. Just need to fab up the choke arm and everything will be hooked up.

I was unable to finish today thanks to one of the top plate bolts being longer than the others. Other than that I sat the weber on the adapter and it looks like the throttle will work fine with the bracket that was included and the kickdown will bolt up just like it was on the mikuni.

I'll post up details and pics when it's up and running.