I just couldn't help myself not saying do this especially this year but you could break down based on displacement if you ever want to add more.
Since you figure a 360 is .6 quicker and 273 is .6 slower than 318, 42 cubes one way and 45 cubes the other. I gave every 7 cid cause 6 x 7 equals 42 a plus or minus .1 for every 7 cubes from a 318. And the list would be this.
View attachment 1715127504
You would have tp drop the overbore.
And add CR ratings. And heads and cams would need to be more fleshed out.
To me the numbers kind of work for the stock low power version of these engines plus mod penalty probably add up.
I think it could be done, food for thought :)
