Hi. I've got a dumb question for the group. I own a '95 Ext cab F-250 PSD
4x4 with the XLT pkg. My brother just bought a '97 Ext cab F-250 PSD 4x4 "Heavy Duty"...What makes the distinction between rgular F-250, and F-250 Heavy Duty? Is it spring rates, shocks, bigger axels, a combination, what? They appear identical parked side by side as far as ride height, ground clearance, springs and shocks "look" the same... Can anyone tell me what makes his a Heavy Duty, besides the fact that it says so in the side of the truck? Any info is appreciated, TIA.