A lot of it depends on the wheel, something like a 22x14 and 37s doesn’t belong on a 1500. Doesn’t really belong on anything, but certainly better on a 2500. It’s a lot of stress due to the extreme offset.
But a 10” wheel and 37s will be fine. 12 would be aggressive with a 37 but probably ok if you keep any eye on the front end. I’m going to do 12s I think, maybe 11s if I can find something.
These trucks are WAY stronger than “a 1500”. Thats a carryover from the 90s when IFS trucks fell apart.
You will want 3.92s for sure. Or regear but don’t even know if that’s possible. 37s and 3.21s is not going to be good for highway speed driving. For sure won’t stay in 8th ever.