The one I mentioned (51516) is the equivalent to an fl400S MotorCraft. It's a longer PH3614/FL910.
The 3/4-16 thread and (approx) 2.8/2.4 gasket size is the most popular combination on the planet. Used by VW/AUDI, Volvo, Delorean, Mopar, Ford, and a buttload of other engines. Some go with a 2.4/2.2 gasket like (I think) Toyota.
Next time you're in the parts store, grab a FL1A and a FL910/FL400S and hold the gaskets together. The difference, within a couple of 0.1's is the can and length of the can. The gasket on the FL1A is inboard a bit. The gasket on the teacup size is on the outer extreme.
You then realize that the thread and gasket are constants on a good many filters and then you're into a given can diameter, indexed over various lengths. For the 2.7-2.8 gasket diameter, you can reason that 2.9x will be your smallest can.
If you want to, x'ref all of the numbers below to Wix. Many won't be distinctly different in Wix ..and some may not x'ref at all. Donaldson appears to offer 43 different 3/4-16 threaded lube filters.
http://www.wixfilters.com/filterlookup/index.asp
If you want to see them in Donaldson ...
https://dynamic.donaldson.com/webc/WebSt...n_Company_Store
P169071
P502015
P502016
P502019
P502020
P502022
P502024
P502069
P502107
P550006
P550008
P550078
P550095
P550226
P550227
P550299
P550318
P550335
P550400
P550572
P550580
P550711
P550715
P550882
P550963
P550971-288-140
P551042
P551201
P551251
P551267
P551268
P551300
P551603
P551763
P551784
P552290
P552430
P553411
P554403
P554407
P554408
P554770
P557780