Here are some Goodyear belt numbers for a 63 Imperial. I am listing these EXACTLY as listed in the 7-98 Goodyear catalog. The fact that it is a 5 year old listing should not make it too difficult for any competent parts store droid to cross reference to a Napa, Gates, Dayco or any other major brand. If they cant cross reference or dont know what a matched belt is...find another store! 1963 Imperial, V-8 413 engine Power Steering ( with or without air conditioning ) 17432 Fan and Idler ( with air conditioning ) 15346 A/C and Alternator 15680* - Matched Pair Since the post was regarding a matched pair of belts, I am presuming that the person who posted had a car with air. The belts listed above are for such a vehicle . I know on my 62, there is a matched pair that run from the crankshaft pulleys to the air conditioning compressor and to the alternator. There is a separate belt that runs from the crank pulley to the power steering pump, and finally one additional belt that runs from the crankshaft pulley to an idler pulley and then to the fan clutch and blades. Hope this helps Mikey 62 Crown Coupe P.S. If there are no objections, we can scan this catalog and post it to the website.