[scarecrow01]

i still say the plenum chamber could stand to be a little bigger, what is it now about a 1 liter plenum, if it was closer to a 2 liter plenum it could house some velocity stacks in there to help with air distribution, but that size plenum would also take up a bit of room

 

[scarecrow01]

have you checked to see if that plenum flows enough to keep the carbs fed right, wouldn't want the far right carb to be starved for air and end up killing the cylinder. just a thought, it's a good idea tho