At least keep the car. I would build the 361 a bit and wring it out for all it's worth. There are some neat old 50's and 60's car parts that would be fun to play with on a car like that if you're not going for max et but to play with some old tech. I'm thinking one of those old 6 stromberg carb intakes would be fun just for the heck of it. It's ok to slow your track et down but don't slow your body and mind down. Keeping your mind and body active in your 70s and 80's and more valuable than having or not having any car!