Originally Posted by 06F250powerstroke
would the front springs out of a f350 be stiffer then out of a f250 2005-07 6.0L ???
Not really a question that can be answered as written, as both trucks use the same springs. The spring rate is determined by options selected when ordering the truck (camper, heavy service suspension, snow plow package), not whether it's an F250 or an F350. Check the tag on your B-pillar for your trucks spring code.
My truck came with 5,200LB front coils and frequently bottomed-out without a winch or plow on the front. Tossed them in the trash and installed 6,000LB coils. Gained about 3/4" of lift in the front and no longer bottom out. Combined with 1" ICON TEI spacers (lower spring perch spacers) my F250 sits level without having to mess with the rear suspension.
Many folks take it a step further and go with 6,500 or 7,000LB springs - which are available on the F550s. Search for "7000LB coils".