You need to clean off and maybe take some sand paper to that balancer so you can see the numbers, 24 degrees should be visible then. You might consider listing your location as someone near by might pop over and give you a hand. If you didn't install your IP on the compression stroke (#1 cam lobes more or less up) you will be 180 out. I think I would pull the IP and make sure when you get the balancer cleaned up. My knowledge of the earlier 240Ds is really limited but I think what I told you does apply to your engine.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"