[drm05]

I installed one on my 72T, same evaporator as installed thru the 80’s 911s. This was a very straight forward upgrade.

Earlier 911’s had the fan speed resistor built into the switch, later 911's had the resistor unit in the lower A/C air intake.

Saying that the fan switch will need to be replaced with a new 4 postion switch, (H,M,L,Off). Some basic wiring changes will be needed as well. Rock has the switches
($10-15) as will.

You use the same stock blower cage, it all bolts up just fine.. Only thing is, make you take special care to adjust and secure the blower cage and new motor mount..(It’s a little different then stock and uses a 3” hose clamp on the mount to hold the motor in place) Do some tests before you button it all up to be sure of the clearances.

Great air upgrade, in my case anyway.