Missed on this combo?

RAMM said

Totally agree with the statement on LSA. A single pattern cam on a 112 LSA with a possibly slower lobe would make a big difference. Of course if the real problem is the intake port is not moving the air and going turbulent (as I have had happen and think this is the case here) then nothing will fix it. What you have here is a great opportunity to learn. I'd get the cam reground with less duration and lift on the exhaust side before going back to dyno. J.Rob

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Jesse,
I agree that if the head port is going turbulent, it would be tough to fix. But, seeing the horsepower gain from only a half inch spacer makes me think the air needs a longer transition into the intake runner. After seeing 7 hp with that little spacer, I would have started stacking every spacer I could find on there, just for the data to analyze. Its probably not the whole story, but worth looking into. I had a 470 give up at 4800 rpm because of this.

And yes, a 112 LSA, although I don't think I would automatically go smaller on lift or duration. Maybe, maybe not.