[Official] HP ProDesk 400 G4 SFF Owner's Thread

Does anyone happen to know if the innards of this can be swapped into a 1U S-1200? It appears too tall with the stacked USB ports just looking at the back of it in the sellers pics. And I would probably need a different CPU fan and power supply?

I have a swanky orange case that I would like to make into a pfsense machine and this fits the budget for sure.