Wow...
Why would you do that on a mid-engined tube-frame car?
I really wish there were a cool kit to put an EG33 with Porsche/VW transaxle into... (or STI 6-speed with rear output blocked off, and center diff removed.) Maybe even an X-trac longitudinal transaxle with a transverse gear set.
But an aft-facing (stock, not rotated) intake manifold actually makes even more sense in a mid-engine location, than front engine. The OE SVX exhaust and intake manifolds would make for a nicely symmetrical twin turbo system possible, something like a Ferrari 288 GTO, with a pair of top-mount intercoolers, feeding the two tb throats. With an ECUtek prepped and blue-printed turbo-ready engine... that would be a fantastic car...
I've not been thinking about that, or anything...
Even a naturally-aspirated airbox would be more easily accessed closer to the rear of a mid-engined car, I would think...
I wonder what car it is that the seller is building... I wish I knew of a nice mid-engined supercar-esque kit car that could accommodate a twin turbo EG33...