The easiest part would be the exteriors...ship models and skins. Replacing what's there with 1970's-80's models.
Next in line of difficulty would probably be the map.
Most difficult of all would be the interiors. Trying to completely change what's there to a nuke interior and merging that theme with the current control scheme. That would be tough, imo.
Mission scripting wouldn't be too bad with guys like tater who really has a handle on that end of things.
But, half the fun is the challenge itself. And success is biting off more than you can chew, and handling it.
You're definately in for a long bit of work though.
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