With the engines and gearboxes you have, do you have access to the driveshafts as well? They are a different length.

The pedal cluster will go in with little fuss. The floor needs to be opened up for the shifters. The crossmember for the trans mount will need to be changed out. On a 2nd gen it is the same Xmember that gets swapped left to right if it is for and auto or manual. I can not answer for a 1st gen V6. The 4 cylinder uses different X members for each application.

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.