I use THIS for my daily driver truck. But it only has modern tire sizes, so doesn't help those with 7.50 x 17 tires like the OP. The load/inflation pressure table is dependent only on tier size and load rating, not manufacturer. I haven't found a table like that from any other manufacturer on the web however.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.