swaping heating-ac for cleaner look

[ibad57]

Has anyone ever swaped heating and ac setup from newer trucks for cleaner firewall look?? I thinking of trying 73-up or80up which doesn't have the huge evaporator box up front. I relise the air intake is located different but if your not conserned with fresh air it would recirculate interior air for heat and ac..
Just woundering if this has been tryed before.
If some one would post a few pics of the front view firewall showing different year setups it would give me some idea of possability
Fab work is easyer for me than buying expensive kit