Intake Manifold identification

[ammorest]

Trying to identify an intake manifold. Think it might be JD from the casting number: 583-23 The hex size of the packing nuts is 1 7/8. Anyone have any ideas? Thanks. Dave

[MMasa]

Yes, it's JD
Correct for 1923-1924 DCA and DCB motors as well as ALL 1925-1929 74" motors.
Mark

[ammorest]

Thanks, Mark. I figured if it was some form of J you would have the answer. Appreciate it. Looking in the 1922 to 1928 parts book the part number would be 1102-23 for the complete manifold with nuts and the number for a bare manifold would be 1107-23. Correct? Thanks again.
Dave