Injectors sizes

If you come down to a 33-35 you could keep a 4.30. I have a 245/70/19.5 on my truck which works out to a 33.3. With the 4.10 ratio it still has plenty of gear for top end. It's all personal prefferance. F-450s have 225/70/19.5s and has 4.88s but is speed limited to 81mph. Yet it is designed to tow 33,000lbs. Running a 4.30 with 35s would obviously raise your rpm but you wouldn't be hating life like a guy with a 450.
 
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