The automatic in the GT was electronic shift so it took its info from the the ECU.
The 3.5 Dohc parts just fit the tall block.

You could weld up the SOHC manifold to move the TB.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.