Pay before you play.
You can do anything, but the Ford Cortina I6 part, pick-up and dipstick will work the first time.
Using, say, a Bronco or reversed Falcon sump will still not work unless you do the tin work in the engine bay your self. Anti roll bar, steering rack and the early IFS crossmember are in different positions on the Cortina. An old I6 block and Cortina engine bay is not hard to cobble up, and you can even use the old Cortina 4 sump to cut and shut to the Falcon one (2.0 OHC Cortinas take as much oil as an ohv 4.1), but its not always as easy as you think.
I've been looking at X-flow BDA Escort style dry sump systems where a flat alloy pan can be placed under the sump, but its easier and safer and way cheeper to use the Cortina I6 item. The costs and risks of sumps are just huge if they don't self clean, and if the pickup doesn't have the right new black anodised screen the right space from the sump floor, you could end up in an akward pickle.