I have a SD 22 from around 1982 / 1983 mounted in my L-R Series 1 86" from 1956. I use it as my every-day car

Yesterday i was happily driving and suddenly there is a very loud bang followed with some intence clunking from the engine. I managed to role of frm the highway in to a side road. When i looked under the motor the oil pan had a 20 cm gash and there was a piston rod sticking out



Before driving this day i checked the oil level, i do that at least twice every month, and it was fine. When i was driving i keep the revs around 3 500 to 4000 rpm on the highway.
The big question now is if it's possible to make the engine run again, what the estimated cost for the spareparts are and of course how hard is it to get the parts ? The repairs would be done by myself and a good friend that is very good with engines.
I live in Sweden so the parts will have to be shipped to me.
I would very much appriciate if anybody here could help me with some answers. Here in Sweden the spareparts are very expencive and i would have to buy them thru a Nissan dealer.