Which master cylinder/reservoir?
The older style connector is Motorcraft WPT446. The newer connector is Motorcraft WPT118/WVE 1P1243/Dorman 645136. The newer connector is better as it has a seal (the old ones don't, and I've had them short out or loose connection in the past due to contamination).
1984 F150: 300 L6, AOD, RWD. EEC IV / TFI, Feedback Carter YFA Carb. Stock everything but radio (for now).