Looking at the TCDS for a 1969 7GCBC... section XX. There are 4 notes for landing gear configuration and those allow different tires sizes including 6.00-6 4 ply or 6 ply, 7.00-6 6-ply, 8.00-6 4 ply. 2 of these apply to spring steel gear with Cleveland brakes. Then there are specifications for installation drawings... 7-1307, 7-1291,7-1404 or 4-2038. Note 201 (h) does't allow 6.00-6 4 ply but 201 (i) does.
The question is how do I know which if any of these configurations he has? I have the original equipment list but it isn't listed there. The airplane has 6.00-6 4-ply tires but it came with 7.00-6 6-ply. Trying to make sure my client is legal here. Help! Thanks!