Need some measurements

I have a 28/29 roadster cowl. going to build the rest. a RPU.Need the distance from firewall to back of body,across back of body and lenth of door on stock body. I'm going to make it bigger but want to know what is stock. Thanks

 

I came up with this, hope it helps

 

It think thats a 30/31 RPU but thanks.

 

heres a pic of the 29 rpu i`m working on for someone else..i measured 52" across the back outside to outside 1: down from the top..from the firewall to the inside of the back of the body is 51: and the door measures 22-3/8"