Need pics & help with installing factory A/C in a non fact A/C 72 Chevy Truck

[kna4977]

I am in the process of installing factory A/C in my truck, but need some reference pictures of the completed job. Prefarably pictures of a truck that came with it originally. I would greatly appreciate any pictures of the firewall. Specifically where the flapper comes through and connects with the vacuum actuator. I am not sure where to mount the vacuum actuator on the firewall, so pics would be great. Also any pictures of the vacuum hoses, and the vacuum source behind the carbureator would be nice, as well as pictures where the wiring harness comes through the firewall. Any help, tips, pictures or suggestions would be great!