[Excaliber]

There are only a handful of engines I would personally consider 'appropriate' for a replica build, just my opinion you understand. The Viper V-10 is one such engine, perhaps because of it's connections through various people to the Cobra world.

Other interesting motor swaps that are pleasing to MY eye would be a Jaguar V-12 in a Cobra, no particular history there however, except an English connection.

Value? Risky as to re-sale, build it for yourself for your enjoyment.

Bear in mind, Ed, was a professional street rod and Cobra builder at the time of the DV's creation.