I just completed converting my high hump to a low hump and it's very easy. Unbolt the high hump. Now I have a parts truck so all I did was cut out the low hump cutting it wider than I needed. If you look at both floors you will see in the low hump there is a line you can follow from the stamping. Once I was close to fitting it I just ground the edges down with a grinder until it fit. Make sure when you cut the low hump out cut extra high under the dash to allow for error. Once you have it sitting where you like line up the holes in your truck where you unbolted the high hump and drill the new holes in the low hump. You may have to use a little extra sealer or insulation at the fire wall but it fits very well.
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