Sorry for reviving an older topic... but great write-up and pictorial! I wish I'd found it before installing mine, would've made it easier to follow someone else's stumbling blocks than to figure my way around them myself (bending the fuel line, bending/filing the throttle cable bracket, orientation of the throttle linkage).
I see your intake manifold is slightly different than the one on my '84 (larger carb base opening than mine). At the end of the adapter plate closest the engine, I see the manifold protrudes just a hair into the opening of the adapter... on mine, that protrusion was greater (i.e., a little "shelf" there... might be why mine is a bit noisy when opening the secondaries). I'm tempted (when time allows) to pull the manifold and hog it out with a die grinder. Your carb looks different too, I guess that's the electronically controlled one? Mine had a smaller electrical connector with only 2 wires. (anti-dieseling and choke). Perhaps the manifold difference has something to do with that too.