Yea it takes a lot of work to get those frames beefed up. Diesel power is addictive and you cant have enough.
I'm getting the urge for bigger injectors and turbo(s) real soon on top of what I've already modified. Let me know if you end up wanting to go with the 6BT. Here's the link to my Cummins crew cab build thread if you haven't seen it:
Sweptline Forum '65 W200 12 Valve Conversion
Cummins Forum '65 W200 12 Valve Conversion
Mountain Springs Power Wagon Service, Paso Robles, CA
1962 W100-340-LU2 winch
1964 W200-340-LU2 winch
1964 W300-318-LU2 winch
1965 W200 Crew Cab- Cummins Diesel