Thats right Potential.... It doesnt make the hp,but has the potential TO
make it.
My 318 is dead stock,aside from cam an carb pretty much
an does a mid 14.
Anyhow,
I think 18 cubes isnt much to fuss about,
Usually go by a horse per cc.
18 extra cubes, 18 more horses or there abouts
IF 2 builds...