I dont have 37's I have 35x13.50's, but thats the exact suspension setup I have (except I also added the 4-link).
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2005 F350 Crew Cab 4x4
PMF 08 Rear Leaf Spring Conversion
20" Harley Wheels w/275/65/20 Nitto Terra Grapplers
SCT X3 w/GearHead Tunes
Amp Research Steps, Bed Rug, Hellwig Rear Swaybar
Truck pic:
