welcome to the forum!
first off, which 123 do you have? what year and model? your engine number shows a turbo motor, so it's after 81, and the chassis number shows .133 so it's a sedan. that's as far as I understand the chassis codes.
second off, I'd change to the plastic fan, it moves more air, and is better for the motor, and it's lower mass is better for the longevity of the clutch!

__________________
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 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!