1955 F250 rim and tire size

I have a 1955 F250 8 lug rim and believe it is a 16 inch.

The tire I have on the rim is a 7.50 - 17.

My truck is in storage, but what is the tallest and widest tire I can put on my truck? (look at pics of truck).

Any thoughts out there in HAMB land?

Thanks...Chris