Stop in for a cup of coffee
You will think I am too critical but picture 6 shows rust holes in the firewall above heater hoses. They are known to rust there and in under the cowl vent and next to impossible to fix. If you look at the side of the truck the cab is lower than the bed line....Perhaps the rear cab mount is going bad. No it is in bad shape and if it was fixed it was a poor job but some big washers/spacers can fix that