It's not a survivor, not even close, but that's OK. Yes it's worth more in stock condition, a lot more.

Yours sounds like a driver TA. If it was mine I would rebuild the 340, or build a NOM 340/360 6 pak, and store the numbers engine.

I would also start to replace the chromed pieces that are cheapest/easiest to find and those that are most-offensive to they eyes (I am assuming you would prefer less chrome, if not fine, leave it).

I don't mind chrome engine parts nearly as much as chromed chassis/suspension parts so if it was mine those would be the first to go.