My Carbs came in and I see that yes I'm gonna have a little issue with the clearing the firewall so we started working on it.
We removed the choke from the rear carb that gains a bit. Then started looking at the linkage and decided that without the choke we could shave some off it to save another 3/4 inch or so, So my buddy Rick the master fabricator tore into it, Accross from the hookup from the linkage is a hole that is centered on the ball for the linkage, so we took an extra ball that came in the Langdon's linkage kit along with a nut that was in there (fit perfect) and welded it in that hole. Now the linkage hooks up about 3/4 inches from where it was before. This should get us close. We'll prob still get the Hammer out and make a controlled dent in the firewall to give extra clearence so it doesn't bind up. Here's pictures..

Thought those might help you with your modifications.
MONGO