kind of embarrassing, but i guess shows how i don't drive my car that hard.
i am in the middle (final stages) of building my own hidden linkage for my 44 IDF's and when i was testing it i noticed that on full throttle, my drivers side carb only opens 3/4. when i had my CB hex linkage - this would have limited full throttle to 3/4 too.
ya.
like i said, a little embarrassing that i just found this, but i'm pretty stoked now that it's fixed. free hp is the best kind.
FIY - it was the gasket between the manifold that was preventing the full rotation of the butterfly arm.
anyway - my new linkage is all fabbed up and spot welded. i am going to sleep on the design before i fully weld it.