Would that work? I mean like with a sharpie, outline the openings of the upper plenum and bore it out to the black mark. I just thought of it but im really tired and dont know if I just thought some dumba** thing. im good at machining things but i mean idlk if it takes some special tools or that wot help hp wise

I ported my plenum with a die grinder and carbide bits. Knock down the walls behind the throttle body, smooth/enlarge the tube holes if you want.

Do some work on the lower intake where it transitions from rectangular to round, thats a real bind spot.

Well that sounds good. But can i siamese my lower intake somewat easily?