Yes! Use the bigger fan but don't connect it to the fuse block. All the
later models with the larger fan have an added heavy red wire direct
from the battery to the fan high speed relay. The small gauge fan wiring
for the smaller fan should not be used for the larger one and you also
need the fan resistor from an 86+ model. It would be best to get the fan
wiring and high speed relay setup from an A/C equipped 86+. The high
speed fan relay socket also has a 50 amp fuse attached to it to protect
the added red wire from the battery. Page 97.141 of the latest Bentley
has the A/C wiring for 86-88.

Mark

John Carpenter wrote:
>
> Hi All,
> I'm installing an airconditioning unit out of a 91Westy into an 85 Westy.
> So far, I've noticed that the radiator fan is bigger, with a different wiring
> setup.
> Do any of you know of anything I should be on the lookout for in the fuse
> block,
> or anywhere else for that matter?
> thanks in advance!
> John C.
> SLC, UT