LT high pressure pump firewall setback 69 Camaro

[srode]

I'm looking around for a prefabbed firewall setback panel for my 69 to make room for the high pressure pump and wiring loom. I saw the Dynacorn 1046GA which looks like it has a bit of a set back but how much isn't specified. Also looking at things from Directsheetmetal, but they don't show anything specifically for an F body, just Chevelles / GTOs but they d0n't have any dimensions on their stuff, so I emailed them. They do have a smoothed firewall but don't call out the setback, looks from the pictures like stock setback. I need about 2 to 3 inches from the plane of the firewall. Curious what others have done to make room for the pump besides fabricating themselves.