welcome to the club ab! A 350 is soo popular and cool. It's fast too. You probably hear of people having them all the time because they're a reliable motor that never gives you any trouble for at least 70k miles. thats plenty of miles. Who drives more than that?
You should definitely just yank that old crusty 351 motor out and give it to someone. Since youre in CA you will probably be out a little for shipping, I'll send you my address so you dont have to just throw it away. Yep, definitely not a keeper. Nope. No way....