Could a teenager build this in one month?

[thebrown83]

Well I went back and took pictures today but I was not able to talk to the owner. The vin on the cab is something like CS148S158475. I also found a cut out vin laying inside the truck that you can read in the pictures. Can someone help me understand the vins? I think you guys are right about it being a 73-87 frame also but you can decide frome the pics. The core support has tall mounts under it and I also found a custom body mount looking thing in the cab. The one measurement I took was almost 5 foot from the spring hanger thing to the back of the frame and this can be seen in the pics. I also saw I was wrong and there is a hole in the floor next to the shifter and i think the hump is bolt on because it has hinges on the firewall side. Sorry for so many pics but i promise they are all pretty necessary.