Betarocker
Adventurer
I ran 4.10s in my 04 with 37s and a manual that was powered by a 6.0L. The ZF6 has an ultra low LOW and 1st is still pretty low. On the top it had no problem pulling through to OD. The 7.3L has way more low end grunt and revs out way sooner than the 6.0L, so I'd say you'd want the 4.10s over 4.30s or you'll be revving out on the freeway.
Now that being said, if you want to take a road trip, my 04 is for sale and it has the 4.10s in it with ARB lockers on both ends and Warn hub locks. With the exchange rate, you could have the entire truck for cheaper than doing the same swap.
Now that being said, if you want to take a road trip, my 04 is for sale and it has the 4.10s in it with ARB lockers on both ends and Warn hub locks. With the exchange rate, you could have the entire truck for cheaper than doing the same swap.