If they are selling the adapters and say they fit your application they must be correct. This is what I would do, might be a little messy. Check what system it has, by taking the filter can off, and take the filter out. Screw the canister back on and screw it down to where you have a 1/16“ gap between it and the housing base. Pull the coil wire and crank the engine about five seconds. If it flows out kind of like a garden hose, then you have a full flow system. If it’s just a small stream, then your system is a bypass type filter. Usually the bypassed oil is bled off the pressure system flowing through a hole about a size of a pencil lead.
Look at the bolt in the linked conversion kit which they are selling for a WIDE range of engines (Combines: 105, 122, 140, 203, 62, 64, 76, 91, 93. Fits IH Industrial: 2404, 2444, 2504, Crawlers: 500, 500C, T340, T340A, T4, T4B, T5, T5B, T5C, Forklift: 4000, Power Units: U123, U2, U2A, UC135, UC135B, UC153, Rubber Tired Loaders: 3514, H30F, H30R, H50. Fits Tractors: C, Super A, Super A-1, Super AV, Super AV-1, Super C, 100, 130, 140, 200, 230, 240, 330, 340, 404, 424, 444, 504. Fits Balers: 55T, 55W, 56T, 56W, 57T, Carrier: 660, Hi-Clear Sprayers: 770, 780, Windrowers: 161, 163, 201, 210, 225, 230, 275, 375)...
it's not large enough for a "full flow" system and appears to be larger than it should be for a "bypass" system UNLESS there's a restriction in the passage or the top end is smaller.
That MAY be why there are reports of lower oil pressure when this kits are installed.
Look at the relatively TINY restriction/orifice hole on the original filter bolt.