LOL...I take that bolt boss bulge out. I hate that thing. Looks like you are getting a handle on it. Once you get your grinder and tooling sorted out, it’s just time behind the grinder.
Then, once you can get the shapes you want, you need to what’s important and what’s not. Lots of webinars out there that are worth watching.
There are things you do that either don’t show up as CFM on a flow bench, or even slow less CFM on a flow bench that make power.
And still, the single most important part of ANY port work is the valve job. And one inch each way from that are what’s really important. Including the chamber. Don’t forget that.
The other thing is not making the air turn a corner unless you have to, and any change in cross section is bad. One example is the “gasket match”. Mostly it’s done wrong and it’s a power killer. You don’t want the runner in the intake manifold to get big at the flange, and the head get big at the flange and the had both be smaller, either downstream on the head and upstream on the intake.
I wish I could draw that out, but a bulge in the port right there is a power killer.
