Anything is possible, just takes money
Things that will fit-
Nothing that I know of...
Things that need to change-
Motor mounts
Tranny
Engine(duh)
Possibly the fuel pump
Exhaust
Computer
Engine wiring harness
Not too practical in my mind if you just want a little more zip. You could get a good bit more poop out of the 22RE for the time and money spent on a V6 swap.
The usual suspects there-
Port the head
Headers and exhaust
Cam
Intake
ARP rod bolts
Balancing
Or, you can get the 22RET(turbo motor set up) that can be tweaked to get a good bit of power as well. Stock, they are not too far off the 3VZ, I think. You'll still need a stronger turbo tranny and computer, but at least it's basically the same engine.
These are just my opinions, ymmv.
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Bob Raby
Santa Cruz, CA
'88 Alltrac (broken)
FOR SALE
'87 4x4 Toy Truck
SOLD
'90 4Runner (3.4 swap, CA certified legal with K&N intake, modified thermal coated headers, 2.5" exhaust, and almost as fast as a stock 3rd gen

)
SOLD