i;m assuming that the answer to this question will be no... but has anyone done this before? is it possible even with fabrication?

I'm going partly from memory here because I haven't owned a 240 for some years but I do own a 280. If I recall correctly the 72 fuse box is in the console and has 10 fuses. The 260 and 280 fuse box is located below the facia panel and has 14 fuses. There are differences in the circuits protected and the rating of the fuses. The later cars also have fusible links for additional protection for the starting and charging circuits. Earlier cars had amp guages while the later ones had voltmeters. I don't know how that would be affected by the fuse box but I think it would also tie in. A swap would take more expertise and patience than I have but I guess anything can be done. MSA sell and upgraded fuse box for the 70-73. It's a direct plug-in and uses a printed circuit board with spade type fuses. It's available with long or short pigtails. They get $160 for it but I'll tell you what. . .if they made one for a 78 it would already be in my car!

ok, thanks.... that's rather diasappointing....