71 GMC 3500 longhorn cooling problems

[torquepower]

Hi there, I'm new here. Looks like a very nice board with lots of interesting trucks, people and info.

Just bought a 1971 GMC, sierra grande, 3500, longhorn TH400, eaton rear 4.10, no air, 454 (will fry the tires at will, even rolling) The 454 looks like its from an 88, with 88 long water pump and pulleys and alternator, it also has an edelbrock performer manifold, HEI.

The truck has a 5 bladed fan with really big pitch that sounds like a jet engine when get going over 25mph, after driving for a while your ears start buzz, I'd like to get a clutch and change the fan to a 7 blade 18" diameter, but the shortest one I've seen in the wreckers (consistent with hayden 2705) only leaves about 1/4" clearance to the rad. That seems awfully close. The truck is missing the fan shroud. I'm trying to find out what parts I need to make it work.

Questions;
1> Did these come with short or long pump?
2> Is the BB fan shroud different from others?
3> Where is a good source for pulleys and brackets? The old stuff is rare around here. Are AC setups different on the pump and crank pulleys then non AC units.
4> I have a power steering pump with remote res, is this stock? What is the res attached to stock?
5> What side is the alternator supposed to be on, mines's on the passenger side.

Any help would be appreciated. Thanks.