340/416 vs 383 vs 440

I try to keep my thinking simple. If I’m happy running 9.50’s or slower in an A body i will build a small block for it, 9.0’s to 9.50’s I’m on the wall thinking. 9.0’s and faster big block. This mainly has to do with the parts I have available and my age (62). If I was younger I would stock up on better small block stuff as it makes working on the car so much easier