I have always been interested in the 5.3 TB's but you can't find one in our area. They would be the ideal Sleeper with a few mods especially. You should try what you are talking about.How the c10 cab fits on that chassis around the firewall and stuff. I have a couple of these laying around and might pick up a couple wrecked 5.3 blazers to chassis swap like you are doing. I am pretty tall and need to square off the front of the cab or I don’t have any legroom and this really helps.
Here is some pics of the c10 firewall. I don't have it on the frame yet.
I found these pics on my phone of a project similar to mine. This guy used the floor out of the tbss and put it in the c10 cab. I'll try to find the thread.
Yeah, the floor on the tbss I got was damaged and repaired very badly. I couldn't use it. I'm probably gonna have to build a custom firewall. I like that smoothed look anyway.That’s exactly what I was thinking steal the firewall and front floor from the TB as well, would sure make a nice comfy truck