Because the '60 three groove gives the proper alignment, and spacing between the water pump and the back of the radiator, I gather. In the CAA install instructions, the FIRST thing it says is that you must obtain a 3 groove water pump pulley from a factory air 352 CID engine. But I DID find one and notified of that, and he bought it. I found that they are as rare as hens teeth to find. I have been diligently looking for the correct OEM water pump pulley for a '59 Squarebird for this conversion for Bill, from Down Under. Bill ~ Penelope, had gone the CAA route on his '60 Squarebird and plans on going the same route for his '59. Here is what I have learned about upgrading from a non-AC or AC equipped 1958-1960 Squarebird to a Classic Auto Air "Perfect Fit" aftermarket AC system. It contains a lot of information that anyone in the future, who wants to go this AC conversion route needs to know. I have moved this out of the For Sale / Part Wanted Forum, because it no longer needs to be there. Attached is what the '49-'59 & '60-'64 Ford Parts listing shows what is required for the '58 & '59 & '60 Squarebird water pump pulley. So once he gets that, he can go about ordering his CAA "Perfect Fit" AC system! I did not remember that he already had one on his '60 and is pleased with it. Bill has checked the pix of it out and has bought it. I have found the right double sheave water pump pulley for Bill! The Bloodhound strikes again! After talking with a lot of our old, or OEM or NOS parts places, and getting leads from them, I finally found a B8A 8509-F, for the '59 Squarebird. By 1960, Ford was using a B8A-8509-A pulley on 352 non-AC '60 Squarebirds, a C0AE-8509-A (1 1/2" pulley & 2 3/8" pulleys) on 352 AC equipped Squarebirds, and a B9SZ-8509-A on 430 AC equipped Squarebirds according to the Ford Parts Text listing. For whatever reason, in 1960, they put a dual belt pulley on that generator, which required them to use a 3 groove water pump pulley, I gather. In '58/'59, the generator then had a 1 belt pulley on it, allowing them to use a 2 belt water pump pulley. But in 1958/59, Ford was using the 2 groove water pump pulley. Bill was thinking 3 groove water pump pulley, which is what he needed for his '60. There was some confusion as to which water pump pulley was needed. Good luck - keep us posted on the progress. The plenum for the dash vent is now available but you will probably only need part of it and have to make something to connect the 2 small round hoses in the modern system to the rectangle dash plenum. I do like the OEM vent rather than adding the two small vents under the dash (but the OEM chrome dash vent is hard to find too!!!). I did use a new condenser and drier designed for R-134. I've been buying, restoring and adding the factory parts but bet it will not work as well as the modern systems since the OEM evaporator was designed for R-12. Carl will probably have that crank pulley as well. You remove the original single sheave add on to the damper (which gave you 2 sheaves on the crank) and add a dual sheave pulley giving you 3 sheaves on the crank. I have removed the aftermarket compressor bracket and installed a correct one since this pic was taken. I plan on removing the dual sheave pulley and one belt on the genny then use the belt configuration in the shop manual which will leave an open sheave on the water pump pulley. I suspect the 8509 pulley was used when you also had the 40A generator option with the dual sheave? I installed it on mine but now the A/C belt will not be able to go to the crank pulley only to the water pump sheave. The pic in the shop manual only shows 2 belts crossing the water pump - Genny and A/C - plus the pulley in the pic does not appear to be the COAE-8509-A pulley. Believe Classic Auto Air uses a 2V water pump pulley. I've wondered lately why you even need the 3V pulley. Not 100% certain 1 inch is correct as I was also adding a 70's Ford 400ci flex fan and needed the correct spacing - Carl will know though. 1 inch spacer (you can get those cheap on ebay too). Finally found what I needed at Flex-a-lite. I couldn't find one and believe even Carl didn't have one at the time. Speaking of which - you may already know but you will need a shorter fan spacer as well. Those do not have the pilot for the fan spacer though. Scanned the "bay" but didn't see anything except the later 61-63 390 version.
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