I do have to say that a Ford engine oil pump drive shaft is a PITA. Yes, a 352 drive shaft will pull out of the oil pump. Yes, it will end up in the pan if not careful (been there, done that on 'FE' Fords, Windsors as late as September and 385's).

Your first check - pull the distributor cap and see if the rotor is turning. If so, you most likely have a timing issue. Second check, are you getting spark (you can reverse these checks of course)

If not turning or no spark, the driveshaft is most likely NOT seated in the oil pump. There is only about a half inch of shaft in the pump and while it might appear to be seated and the distributor installed correctly, it isn't. Yes, you MIGHT be able to reseat it, but I would pull the pan and replace the driveshaft with an SVT or ARP HD version and install a new clip just to make sure you don't have a gouged shaft fail in high cycle fatigue while driving in East Nowhere, Nevada on a Sunday afternoon.