Help me decide: 360 or 400

My vote is for the 360. JMO Can get good power and have a lot less weight on the nose

^This! While I'm no road racer, the old A's lean more than enough going around corners with a small block. I prefer a more balanced package. If brute torque, and straightline speed is what you crave, take that 400 and stroke it! You pays your money, and you make your choice.