The masters from which those publications are reprinted are more than 40 years old, and in many cases sections were missing from the masters. Some reprints have all correct sections...some don't. This is true for all the binder books and light line repop publications. These type publications were produced to support experienced, trained mechanics with much experience working with IH products, they were never intended to be used in "hobbyist" mode! Even mechanics and parts personnel back in the IH dealerships had their own training methodology just to learn how to use these books, same for the parts lists. I sometimes have to spend an hour finding stuff I need for reference because the organizational system IH used was completely different corporate-wise as compared to the other "big 3" manufacturers. Many times, the info you are looking for is not contained in the section you "think" it should be, ya simply have to turn the pages until ya find it!
The specifications and "test data" in IH manuals comes at the end of the section where the service procedures are described for all componentry. In the case of the delco I-4 distributor section, it will be labeled "cts-2141-z". But that same section was printed originally under many different "cts" footers and was a component of many different manual configs for medium duty truck, light duty truck, ag equipment, etc. I have the big book which is the cts 2300 (8000+ pages?) which has data on every system used on utility, light duty, and medium duty IH vehicles.
One version of the Scout 80/800 repop manual I have covers only the Holley distributor and does not contain the section for the delco. There is nothing in the way of "data" that is common to each unit other than a base timing spec for installation of the distributor itself. Dwell/point gap, vacuum advance spec, advance curve spec., mechanical inspection points, etc. Are completely different for the two units.
Looking at the chart right now, I count seventeen individual part number distributors that yours could be, that's just the delco unit. If you don't have the original metallic p/n band on your unit, it's impossible to figgr out which one it is without running it onna distributor machine as described in the manual to determine what the curve "might" have been originally and then comparing to the data sheet. The delco units do not have an IH p/n stamped on the body as do the Holley units.
The delco cast iron distributor is far superior in every respect to the Holley in my opinion (same for the sv application). Dam near can't wear 'em out (shaft/bushing-wise) and are highly "tuneable". The end play on those is always the problem...that let's the timing "walk" as engine rpm increases/decreases. And unlike the Holley unit, the vacuum canister for the delco is available anywhere, even several sources for "adjustable" canisters. The "uni-set" delco breaker point/condenser is universal for all 4, 6, and 8 cylinder delcos, as well as the rotor. Only the cap is specific and an 8 cylinder cap works just fine for a 152/196 4-popper distributor.
