Welcome to the forum mxr!
That's a fine lookin' rig...very well put together!
Bein' a '74/'75 "squarebody, it's majorly diffeernt sheetmetal-wise and under the sheetmetal. The 200 denotes as being originally a so-called "3/4 ton" platform but in actually it's gvwr coulda been spec'd to be much greater! IH didn't build rigs like chryfordrolet, these were built to individual dealer order and no two were exactly the same, there was no "pool" versions ever, even though many were sold on fleet orders where the spec's for all were identical. This is /was common practice in the truck industry, not so in passenger vehicle bizz!
Those "last gen" rigs were unique due to the "down and back" placement of the engine as compare to the m/y '69>'73 d models. Notice the deep radiator shroud as opposed to the more shallow shroud you will see in pics elsewhere on the forum. See this thread right under yours regarding some of that "difference":
http://www.forums.IHPartsAmerica.com/readers-rides/793-1973-1210-Travelall.html
Pickups and travelalls are basically the same product, different body of course, thus we refer to this stuff as "fullsize" as compared to the various Scout series models.
For the last two year models...the hoods, grills, roofline, front fenders, front section of the frame' the engine mounts, the added bracing under the front fenders, etc. Were somewhat different from the earlier designs, thus many parts do not interchange!
Production of the fullsize stuff ended with the '75 model year production run, though there were some 1976 models produced to fulfill fleet orders, governmental fleet orders, etc. In general, we consider the '75 as the last fullsize vehicle from the IH light line production operation.
Drop the glove box completely out of it's compartment by squeezing the clips on each side and releasing. You hopefully will find a "line set ticket" taped to the back of that box, that is the complete production record for that vehicle, and no other.
Keep asking questions...someone around here will help ya out!
