from 4WP Corporate Headquarters
would this work on my 1999 F350? also can it replace the stock blocks or does it go on top of the stock ones
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Yes these are for a 1999 F350. They say yes to replace factory blocks, but also include this note: F250, F350 and Excursion models have various sizes of factory blocks. Amount of lift the block kit will give will be the difference in size between the factory block removed and the size of the block included in the kit.
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