A Binder! I've had a few. 1975 was the last year for the pickup/Travelall trucks (and cab chassis sized similarly). Modest differences in the heads for smog engines (probably not a smog engine in Alabama). The engines were long lasting, nothing too special about them other than that. Everything ate gas then. Same engine would go into a 1600 or larger truck. In 74 they changed the model numbering scheme from the 900,1000, etc to 100, 150, 200, etc for the 1/2, 5/8, 3/4 class trucks (smaller than the large frame trucks. I presume this is the same for the 1300/1310 trucks (1 ton and under 2 ton).
You should find the line setting ticket (build ticket) behind the glove box (empty it out, then push in the limit tabs on the side of the door). It will be taped on the back of it. If it's not there, you can go to an IH dealer and they can run the VIN to print out a new one for you. But you already have the major info. The nice part with these trucks is that IH built them to work, not ride around and profile in (so no, they will not ride well when empty), and they used mostly standard components.
The only funny part is (as I recall) the stock electronic ignition came in two different colored brains (one gold, one black, IIRC). One was the better version. But they used Holley or another manufacturers distributor, so it's easy to change out to an MSD or other unit. The carb was (stock) either a Holley (the 'list number' is printed/stamped on the carb) or a Carter Thermoquad, so again, an easy fix. Some had conventional mount fan to water pumps, some had a coupling nut on the shaft. Most had a standard Delco alternator (but dual belt pulley). For those that haven't used them, you often can't get the dual pulley version in stock, so swapping them out is easy. Also, a store often doesn't have the correct 'clocking' (connector position relative to the mounting lugs). Also easy, you remove the 4 screws holding the two halves and rotate them to match the one being removed. If it has the Motorola alternator, you go find the Delco mounting brackets (or make some) then put it in on failure.
One thing about IH is that they often didn't release enough info to the rebuilders/ aftermarket. I had issues with getting a correctly rebuilt Delco starter for my 1974 392 (the starter had 4 field coils, but the rebuilders always cut the 4th ones lead -- made you have to click the starter several times to get it to work correctly). Don't know why.
The cabs tended to rust out in the vent boxes (outside edges of the windshield down to the top hinge of the doors) due to leaves getting in and plugging them.
The 266/304/345/392 v8's and the 152/196(304 & 392 divided in two) slant 4's share most components (slant 4 is literally a V8 with one cylinder bank missing, a new cam, and a new crank; a Scout only engine). 304/345 have the same bore, different strokes, 345/392, same stroke, different bore. 266/344, same block/stroke, just bored out (worth doing if you have a 266 at rebuild time).
Easy search on the web:
Binder Bulletin - Powered by vBulletin,
Binder Planet Forums. Even a couple of hop up articles.
Nice factory emblems -- a lot like the iron sites on a rifle. Another item that IH made once: 50's era M1 Garand's (and refrigerators, etc).