The two letter code inside the rim, hidden by the tire (in your case JK; the other common one is JJ) is NOT the wheel code, but the SAE bead shape code.... ignore those. No clue what the 932 means.
The markings by the valve stem hole are the important ones (M5 8 HN).
The two-letter Wheel Code IDs the wheel & matches Pontiac Parts Books.
HN is the RallyII used on 1971-75 Venturas (including the 74 GTO).
The other codes are Manufacturer and Date codes, which were relocated from inside the rim starting mid-1968.
Mfg Code consists of a letter followed by a number. Your M is for Motor Wheel Corporation (a Goodyear subsidiary).
- if your 5 is right beside the M, it's part of the Mfg Code (Line# maybe?)
- if your 5 is underneath or separated from the M, it's for the Year 1975.
The 8 is either Day of Month or Month (August)...you're missing 1-2 digits
Your wheels may be part number 525708