Updates, here's what i have done in the last couple weekend. I got myself an old rusty cab, from
www.callingallcars.ca cut the roof and back out of it and just keep the floor and firewall. After getting it home cut some more not needed sheet metal off.
Mounted a couple of braces to hold it together.
It now ready to be set in place. I'm using this floor/firewall to help me muckup the engine mounts. It much easier to move a floor on and off then a complete cab assembly. When i get the engine/tranny where i want them i'll be reinstalling the good cab.