Originally Posted by smurfs_of_war
Go 4.10. The difference between a 3.73 and 3.55 with a 4.6L is going to be far from earth shattering. If you're going to regear it- 3.73 is almost moving laterally.
Let me add to that. If you're running with a 4.6l and really want to liven it up for pulling, the 3.73 will yield a difference for sure, but not enough that you'd be happy with the time and money spent. Just my humble opinion. The 5.4 was the engine designated as the hauler- not so much the 4.6 but it will do the job. It just needs a few enhancements to make up for the lack of torque