I've been through the on line manuals as well as Wes' photo pages, and
several vendors pages and can't find one with the ridged top like mine.
The orange would suggest a Fram, and I've seen one with the ridged area on the bottom, but not on the top, and certainly nothing with that weird stamped T-handle on top. Only two fittings, one on the side near the top, and one at center bottom.
This site shows a fram description of the F3 & F4. It mentions restrictors needed if oil pressure falls. This may be similar to the restriction orifice in your oil return line.
There are no orifice fittings that I can tell, just adaptors
from the filter canister threads to tubing fittings.
I'm going to watch that EBay auction. Granted it is new,
but if he gets anywhere close to 300 simoleons for that thing
I'm yanking mine, giving it a cleanup and putting it on EBay!
I have seen this type oil filter fitted on jeep engines when used in stationary applications.
With these element type filters, you need to always keep a filter in it--the oil being pushed through the filter creates the restriction needed to keep from bleeding off too much pressure and scoring a bearing.
Harold W.
MVPA #6833
1945 GPW
1950 CJV-35/U
1951 M38 1952 M38
1962 USMC Contract M38A1
1953 Strick M100 1967 Johnson M416
1968 CJ5 4-Speed 1969 CJ5 V6