Is your 380 a single or double chain ? if you plan to keep the car and it's a single row sure would be the time to convert it to a double row chain if the rest of the engine is in good shape.Doing a change over is fairly labor intensive and all sprokets have to be replaced,if your 380 engine is tired might be smarter to put in a used engine seeing as how you are going to need both chain and head work. I really like the 420 engine that is in my 500 SE a 420 engine should fit right in and would give you a nice power increase you might need a 420 ECU ........
William Rogers.....