Ok, I ran the numbers on the hayden site http://www.haydenauto.com/Online%20Catalogs-eCatalog/Content.aspx and used the "Parts Specification Search" tab (under the "part number" tab) and this allows you to select the different attributes of a given clutch fan. I pulled up the thermal clutch fan that is suppose to be for a 69 Firebird with A/C which is part number 2705 and copied all the part specs for that clutch fan and then went into the above mentioned search tab and started adding the different attributes and values for the 2705 clutch fan as I want them all to match with the exception of the fan mount height and overall height. Once those were all added I went to add the the fan mount height (I never touched the overall height as that would be determained by the fan mount height) and was only left with two options for the values. And that would be the standard 1.53 or 2.03 height. I selected the 2.03 height which brought back only one part number. Part number is 2707. This is used on a whole host of vehicles to include CADILLAC BROUGHAM (90-87)
CADILLAC DEVILLE (86-82), CADILLAC ELDORADO (84-81), CADILLAC FLEETWOOD (86-82), CADILLAC SEVILLE (83-81). It is also used on PONTIAC BONNEVILLE (87-70), PONTIAC CATALINA (81-70) , PONTIAC FIREBIRD (81-77), PONTIAC GRAND AM (80-73), PONTIAC GRAND LEMANS (83-75), PONTIAC GRAND PRIX (84-76), PONTIAC GRAND SAFARI (77), Pontiac GTO (73-72), PONTIAC LAURENTIAN (81-76), PONTIAC LEMANS (81-68), PONTIAC PARISIENNE (85-76), PONTIAC PHOENIX (79-77), PONTIAC SAFARI (69), PONTIAC TEMPEST (70-68), PONTIAC VENTURA (77). There are a lot more that this fan works on. So for what you need it looks like this is going to be the longest or tallest one you can get that will actually mount up for our purpose. I will wait to see if this part number 2707 is the same thing Desert68 used.