Today, dollar for dollar, is the 318 faster than the 340 ???
What gets me is that almost nobody cares about the 90 cid and the 0.32”bore difference between a 440 and 360, but the 20-42 cid and 0.040-0.13” difference between 318/340/360 is a huge chasm. And that a 440 would be happier with 3.55 or less gears, less stall etc.. and yes you could build a 408 out of a 360 but you could build a 543 out of a 440 and I bet dollar for dollar you’d be better off with a 440. I know, I know size weight, price of performance.