The MT-63 only lists one starter,no specific engine or truck model. The same starter was used in early R series 100-160 (MT-97) for all engines,with later models the starter is listed for specific engines.SO the one you have
should work.Count the teeth on the drive,there should be 9 as I found the same starter could have different drives.
I took the PN's for the pinion (bendix drive/1878079) and the complete starter,which had both a Delco-Remy & IH number.I then proceeded doing web searches.The drive didn't get many hits though,so I tried the complete unit numbers to see what I got. Surprisingly the IH pn got some of the better results.
69692R91 Starter <IH>
https://www.google.com/#q=69692R91+starter&start=01107074 Starter <D-R>
https://www.google.com/#q=1107074+start ... 0&tbs=li:1\
1108021 Starter <D-R ,replaces above>
https://www.google.com/#q=1108021+starterThere are complete starters and parts in the search results so you have to read. I found PN's for the brushes,bushings,solenoid and other parts to do a rebuild,even the drive! Just by using the starter number(s).
I'm sure items like the brushes & bushings etc. can be found using the PN's from the IH book,I have for a KB starter. That would be a good way to double check any found using the starter # the way parts on the web are listed and definitely advisable with Napa.
http://ahwooga.com/vintage-auto-parts/c ... 1945-.htmlhttp://www.tractorpartsasap.com/Starter ... 112255.htmhttp://www.usautoelectric.com/store-pro ... 95933.htmlHere's a link for Group 8 in the MT-97 (R-series) parts manual since the illustration is better for a breakdown of the starter. See FIG.08-11
http://www.hansenwebdesign.com/truck/fi ... System.pdf