First of all, a big thank you to everyone for your support.
I ordered the ARP Oil Pump Driveshafts and will try to fix the old oil pan. If it doesn't work, it's not so bad, now I know the steps that are necessary for the work
.
I'll also look at the Oil Pump and the Oil Pickup and maybe order the one with a higher output.
I phoned the dealer who sold me the car. He immediately told openly and honestly what was done.
The old ignition distributor could no longer be turned and adjusted. That's why his mechanic got the order to exchange it for a new one. Wasn't the cheapest on ebay, this one cost around $400 from a German Mustang parts Dealer.
It must have taken the mechanic a long time to remove the old distributor.
He also wonders why he didn't say anything, because then of course the oil pan would have been removed as well.
@ clevelandcoupe: So your are right. Not happen in the last 50 years, happen just now
So I have to wait for the parts