Wow, what a "rabbit hole" subject. Things have gotten much more expensive. I thought it would be easy. Junk yards on the GM products say the rims are too old and not available. You have to find a used truck to get the rims. LOL. Thank you all for the information. I continue to learn from you all. Good stuff!
I like the 4 Runner and FZJ80 ideas but unable to locate a set of 4 at the junkyards in my area. Also, would have to purchase the 1" spacers. To use them for the fronts to get around the tie rods. My Tundra rims might work if I used 1" spacers. That might be the cheapest way to go along with longer studs for the front.
This may be the fix. Called Les Schwab (west cost tire store) and they recommended a 16" Allied 80 white spoke steel rim. The cheapest they have $102 each. These are 16 x 7 then have to spend $120 to mount the old K02s. The OEM have a 3.5" offset if i measured it correctly (block of wood and tape measure to hub). Will have to dry fit the white spoke rim for clearance/fit or wait for some to show up on marketplace or craigslist.
Sandblasting and powder coating my OEM 15" rims ranges in price from $95/rim to $145/rim at local shops. I have nine (9) rims to do - 4 for 1975 FJ55 and 5 for 1972 FJ40.. Maybe I am just being too cheap or old and/or BOTH but this seems expensive.