WOW! Unless it is too good to be true, (and with the number of repro Packard tanks they offer, I am not sure it isn't) that site and the several other year Packard -- even prewar --repro tanks is quite the find. It is the first I have seen of anyone offering
repro tanks for Packards other than the 51-6 models. The 51-6 repros became available a few years ago but even those require a bit of tweaking.
There are two part numbers for the 47 and different ones for the 48-50 tanks. Other than capacity, I cannot say what all the differences are or if it will be a drop in direct fit -- but it is a start and the shape looks good. There were 17 and 20 gallon tanks for those years so depending on what the repros are it could be another difference you would need to contend with and that would be getting a different capacity sender. The arm length is the difference there. As Packardtaximan said, the 47 sender mounting is different as well as the ohms. If you need something different, KM Lifestyles may be able to make you a new sender with the correct 47 ohms which should be 100 at empty and 0 at full but with the 48 mount. 21st series senders are the straight resistance type while 22-23 series use bimetal heater type senders and operate quite differently.
I can say with absolute certainty your 47 tank options are very limited. Make that one fit, have your old one restored to almost like new condition by someone doing the
RENU process or find a good used 47 tank. There are no other repros I am aware of and good used is almost extinct. Just as additional info, this 22-23 series repro tank is so new one poster who just recently completed a 49 had no other option than to heavily modify a different capacity Chevy tank which as of a couple of years ago was the closest he found to something that would fit.
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