The main problem that I see with this swap is that the 3000GT engine is mounted sideways while the monty engine is forward facing..not to say its impossible but like doug said could make for some interesting exhaust work and general PITA to adapt all the likage and bracketry.Clearance issues would be the main concern...

99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..