Guys, thanks for all the input, brought the fuse to my field today w/the motor, the guys were drooling fromt the mouth. Did all the math, Im going to build up the firewall 3/4" and use the 45mm standoffs. It will give me the room I need for the rear carb setup and almost 1/2 in of breathing room for air intake. I just need to move the cowling as far forward as possible.

Should be a real thrill to fly when all is done, will keep you posted.
THANKS AGAIN GUYS