I want to mention a couple of things that I took away from this.
- I'm not going to say it's impossible to do the floor pans without the cab mounts, but it will certainly take you A LOT more time. Unless your cab corners are in spectacular shape, I'd say replace them at the same time. They're not super expensive.
- Since you're doing the cab mounts, get yourself a spotweld cutter. They're like $30-40 and will save you a ton of time and frustration. I tried to remove the cab mount with a drill and chisel, and I wasted about an hour with basically zero progress. I said screw it, and hopped on amazon and bought this: https://www.amazon.com/gp/product/B002X ... UTF8&psc=1 Got back to it a couple days later and had all 8 of the spotwelds that attach the mount to the seam on the firewall cut out in about 30 minutes.
- I bought the replacement pan, replacement cab mount, and the cab mounting kit from Dennis Carpenter. I was not happy with any of those items. The floor pan appeared close to the original part when I was installing it. I got it trimmed up and welded in without too much trouble (or at least no more than I expected). However when it came time to weld the cab mount back on it became apparent the pan wasn't shaped exactly correct. So there is a huge gap where the cab mount transitions from floor pan to firewall. The cab mount itself appears to be formed VERY close to the original; I'm pretty sure it's the pan that is the issue. The problem I did have with the cab mount is a minor one -- the cab mount from DC has 2 holes to mount the inspection cover; the truck originally had 4. So I had to weld those up and drill 4 new holes. And finally on the cab mounting kit; the bolts that come with the kit are too short.... Going to have to go buy longer bolts. Not super happy with Dennis Carpenter.