mount the 420A and NV-T350 longitudinally like the silvia and take two AWD rear diffs. put one in front & one in rear. get a Quaife LSD for the NV-T350 and theres your center 50/50 diff. you would have to fab a new crossmember, oposite side TB mount intake, header & new shift, throttle, & clutch linkages. that alone is cheaper than getting a new EVO tranny, something like $5000 im sure - STi trannys are $11000(whered you get an EVO take-out?).

the only mechanical problem i can forsee (i know theres a billion, but stay in theory) is that the front AWD diff(from rear) would spin a different direction . you could have the driveshaft for the front turn two cogs & that would reverse and correct the spin???? if not a dana 44 would be a nice fit, but making cv boots....omg.

ive thought many a night about this....

probably the cheapest way out. not to mention the dopest & would naturally have to be AWD. otherwise the trans would be half used.

comments?

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-i tweak therefore i am.