Is this motor worth anything?

Simplest might be to keep the TBI. I think the fuel controller is close-coupled to the engine, so would be easy to keep together. Probably just feed the box +12V, gnd, and ignition and you are done. As I recall, it is basically that simple even for later Magnum engines. If the box is smashed and you don't want to get another, you could run the TBI from a Holley Pro-jection box, which you can find cheap on ebay, but get one with a harness. Megasquirt is another option. For spark, you can use a 72+ small-block distributor w/ box or the original if you keep its controller (same box as fuel probably).