I have a 1960 S2 88 that I put a Mercedes 240D into, love the truck, been driving it for 5 years now, used one of Jim Youngs adapters.
Just finishing up a 1963 2A 109 pickup with 200TDi. It's running and moving around the shop, should be on the road in about a week, I'm hoping it's as nice to drive as the Merc truck.