The entire drivetrain will fit in the 124 body. You will have to deal with driveshaft length...

Diff fits...

I may do the same to my wagon... one of them anyway...

And I'll be putting my 2.2 5 speed behind my 2.5T 190...

FUN!

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!