Our old white truck had 245/40/19s on it and I think that erock's truck had 245/45/19s on it but I am not positive.
You cannot run all 6 aluminum 19s for a couple of reasons. First is that your lug studs are not long enough. Second is even if the studs were long enough the inner wheel will not have lineup pins to center the outer wheel and this would create a bounce or vibration.
Also the extra thickness of the inner aluminum wheel may cause some clearance issues on some trucks with the leaf springs and/or the outer dually fender.
Found these on street source
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I really like the ones on the white one above...anyone know where to find them?
Those are the old APP Retro 6 wheels. I don't think that they are in business anymore. I have not seen any of the wheels in years.
I can make you a set similar to those if you are wanting some.
Anybody have a guess or know what tire size might be on the white truck? I'm thinking 40 series sidewall. Really like the setup on it.