indexing plugs for power

what have you guys found in power with indexing spark plugs??

looking to try this on an approx 800 hp pump gas 548" bbc

has nothing to do with piston dome clearance,just talking about pointing the plug in a way where the ground strap isn't orientated in the way from the air fuel flow path

also,are you pointing the gap so its facing the intake valve or facing between the intake and exhaust valves,which in my guess isn't all that critical

thanx!