I found a Delco catalog online and many of these older starter are not provided with the part number for #1 Frame and Field (aka the body of the starter motor). Would the part # be 736 or is there some other way of determining its part number?

Delco 736D, shares all parts except #6 Motor Drive Housing with 736G which is superseded by 1108190 (10MT) superseded by 1109393 (solenoid engagement)

A new starter could be made of parts - the only part I couldn't find anywhere is as OM said, the Motor Drive Housing, but I expect that with a donor housing that otherwise fits the starter motor, a new housing could be fabricated
- 1 Frame and Field - not listed - probably need to get a starter from a donor vehicle e.g. Cockshutt 540, Chevy Belair / Corvette (6v)
- 2 Field coil R.H. / Upper 826282 - ebay $70
- 3 Field coil L.H. / Lower 826281 - ebay
- 4 Armature 818002 - ebay $60
- 5 Commutator End Frame 1908580 - ebay same as '54-'55 Chevy Belair, Corvette $40
- 6 Motor Drive Housing 1847676 - (not found on internet)
- 7 Motor Drive Complete 1850844 - available on yesterday's tractor for Oliver 60 (starter motors 1107905, 1107065, and 1107939) www.yesterdaystractors.com/Oliver-60_Starter-Drive_1850844.html $35
- 9 Brush 811553 - ebay $20
- 10 Brush Spring 813521 - ebay $20
- 11 Brush Holder 810226 - ebay $20
- 13 Brush Ground Lead 813554 - ebay $20
- 14 Brush Connector Lead 819362 - ebay $30

Scott, what does your guy have for #1 Frame and Field? The diagram does not show a part number

Great! Thanks Josh