I have some wheels like that and they don't scare me at all. I have 17" tires on my 3500HD GCM. I replace the tires at 3 years because I drive 80 to 85 quite a bit. But they are still good enough for an old vehicle. I put 16" radial tubes with TR150 stems in them. I am 81 years old and have been changing multi piece wheels for 70 years. I still change them myself because I don't want anyone changing them that is afraid of them. Your other option is 16" Ford truck wheels or 16" drop center GM wheels up to about the mid 1980's. 7.50x16 tires are very common.