I more week......and my 70 Dart is on the road

Excited for you but please tell us you will have a grommet or some protection for that wire bundle going through the firewall.

Congrats on being so close - it will be worth it!!
That was a quickie mock up from yrs ago
I'm going with a standard thermostatic fan clutch , 20 inch fan, is engaged 60 to 70 percent of the time