Well after more searching online obviously I'm not the first one with the extended cab idea they even make an entire extended cab kit. I've found one other truck on the web that has an extended cab and it's here
Custom Extended cab 41 Chevy I've got a couple guys that can do his for me so it looks like now I need to figure out what I'm going to do with the frame and rolling chassis etc. this truck is going to be a lot of fun..... And money.
