high hump low hump differences

[old Chevy guy]

Theres a depresion in the floor where you need to cut it out. then drill holes and use the clips like on a front fender for the bolts. Wait till you have the high hump and then you can better see where you will want to cut and how much.

[bobs409]

Installing a high hump is just a matter of cutting the hump out and drilling some holes. You'll also want to lightly roll the edge a bit. I just used a dolly and hammer, real easy.

I installed a new repro low hump floor pan into my wrecker and did as I mentioned. Firewalls are all the same.

One other thing depending on how correct you want it. I welded square nuts on the bottom of the holes as the factory did. Real easy to do, just a few tack welds on each. New square nuts are available just about anywhere.