Join Date: Apr 2008
Location: Beeville, TX
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Twin I-beams suck, but they will work withe the weight of a diesel. I have a dozen twin I-beam trucks, and they work well enough, provided you keep after them. I would suspect that you will have to rebuild the front end very shortly after you put the extra weight on there. Once you do that, you should be good for another 80K miles without major difficulty.
The ball joints are exactly the same ball joints that go in a 1 ton truck, so they won't be your major problem. You will probably need replace the springs with 1-ton truck springs. All the other front end parts are the same, so with just changing the springs, you should be good to go.
Eli Benson - EMT, Ambulance Mechanic
'08 F350 Dually KR - Spartan'd
'07 F250 CC SB 4x4 XLT - SCT /w Innovative Tunes
4 '09 & '10 E350 6.0l ambulances
1 '08 Duramax 6.6 (LMM) van ambulance