As usual, the big cam guys have totally missed the point. You said 218 at 50 and 114 LSA = gutless pig. They'd have you go bigger on the cam?!?! Well the majority at least.

I'd suggest two things - Less intake duration and tighter LSA

Hughes SEH1016BL-12 is my #1 choice.
This camshaft has the highest lift for its duration which will allow the E-heads to work better. I would ask them if getting it ground on 110 LSA would work better for your application.

A straight Performer may be your best bet for this application. "But it's the same as a stock intake!" No it's not, it has 20+ years of development over the stocker. Plus as everyone else hates the Performer there should be one out there in your price range.

The advance curve can also help a lot.

I like the Super Turbo 17748 or 17749 for your mufflers, 2 1/2" pipes at least from the high perf manifolds to the mufflers, plus H-pipe.

R.