i dont think ur gonna get much out of 2 small twins, other then complexity. thats why most rx7/supra owners ditch the stock twins and go with a large turbo or parellel instead of sequential. if you have an open enough exhaust, turbo lag shouldnt really be an issue with a 3.5.

TMIC r nice but there always the problem of heatsoaking. on a hot day after a few runs the area ontop of the engine might be extremely hot, thats the problem wiht TMIC. the best place to mount the ic is acutally in a V or H mount with the rad and oil coolers, if space allows. V and H mounts allows teh rad/oil/ic to receive maximum cooling without the blockage of a FMIC.