BB into a 66 barracuda

383 fell through. Broke my heart. Car sold just hours before I was going to get it. Back to building the 360. Guess I'll use the $ saved not buying the 383 to make a better 360. I'm still excited about the build but literally dreamed of driving it with that BB in it. Girlfriends brother has a 71 440 with 28k miles on it said he would sell it to me for a grand then said he'd let me have it for quite a bit less. Should I buy it and sit on it for my next build and yes there will be another or do I dare put a 440 in such a small car?