Hmmmm....first of all, yeah, Andrew, I looked at that spacer and it must be for adapting the existing intake to run forward.
But....that stock intake is so small!
My guess on the carb is that you'd want at least a 15SHA or something close to that. I'll bet that carb works great with anything up to a 16mm. 14 might be too small.
I'd be real concerned that the intake is too small. But that's just me.
I'm on the fence right now in terms of doing what you did and just buying the other one Treats has and saying, 'fuck it, I'll make it work later'.
From what everyone has said, it sounds like it's a real nice kit with good power and durability. Kinda of a 65 Metra for Sachs.