" Any port can flow a lot of air if you can make it turn" (efficiently). This may run counter to what intake porters today think but we have done some experiments within reason with something I got from NASA and when you need to turn high velocity air it might like a little more space in the transition on the short side. Head porters have done this in the bowl entrance for years but it is applicable to intakes with bends like the #1 & #5 in 5.0 intakes as well. If you want a stock looking intake you are limited to the casting but there are still areas that will respond well when you push the casting limit and possibly do some filling on the long side - if you have air probes it will tell you what you need to know. This article says a 40% reduction in restriction. If you can get even 5-10% on those front runners by modifying dimensions on your short side (note the basic shape you see in the pic) you've done a LOT for flow balance without hurting air speed. That's 13-25 cfm for an intake flowing 250 cfm.Any.port can flow alot of air if you can make it turn. Faster it is the harder it is to turn. You can have to much speed. After flowing some of these heads i think there are gains here. I am just playing on my own stuff while on lock down. Not a sales pitch.