spent 8 hours on the road yesterday only to end up back at the house (had to run to Cincinnati to pick up a thing). was a nice diversion to get out and make use of this cheap diesel.
30s fit with no concerns whatsoever. 31s with the good possibility of rubbing at full lock (can be fixed with the WJ arms)
stock rims are required for 31s or you will be rubbing those 31s on the flares. probably pretty bad depending on the backspacing.
I called my pop to check (I'm stuck 700 miles away) and it is indeed a 7 3/8! but I'd only trade it for another. the replacement can be of any size, but has to be complete.
In a small defense of the engine, my 2.8 went 200k before I sold it. but it didn't get there quickly, that's for sure. that carb suuuuucked.
there's a bunch of info on the 3.4 swap in the link in my signature
google says it applies to the early 2000s dodge SRT-10 when ordered in yellow.
it's not an MJ thing. but that letter code still applies. Chrysler's computers just don't know what it used to mean.