318 stroker using Scat crank

is this a preferred combo?
corvette LS 3.94 x 3.62 stroke
new hemi 3.94 x 3.58 stroke
i also have been considering this build ...

Smaller bore are better for emissions, more complete burn, and 318 bore size still offers great flow potential,
But will lose a few ponies to 4" plus bore especially when shooting north of 450hp