1967 1/2 ton stepside Pro Street

[joes50pu]

Hi, I purchased a 67 chevrolet 1/2 ton Stepside from a friend of mine a year ago and finally decided to start working on it. The truck has been back halfed with a Chris Alston kit and it has the full roll cage in the cab with the bars coming through the back window. The firewall has been cut out so I'm looking for pictures or dimensions on what others have done with a new firewall. I was thinking a 4-5 inch recess in the center section but would like to see what others have for a firewall. Any build pictures of similar projects would be nice.

Thanks in Advance for your help,

Joe