Hi JUDGE3
The picture you have put up is like my firewall.
If you look at the picture of my firewall, the holes for the blower motor and EVAP have been plated over from inside. I have outlined them in Red
The two pipe connectors you see on mine are coming from the Austin Mini Heater box, inside my car.
I will remove the plates next week, and the Austin Heater box.
I have bought an A/C heater inner box, and will get it ready to fit. Needs a bit of a tidy up. Will take about 2 weeks to get here though
I am currently trying to get an A/C delete box kit from here
https://www.acdelete.com/pages/70-81_F-Body.htm
But they are not answering my emails for some reason
Thanks JUDGE3 for helping and everyone else
Much appreciated
Mick