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Hi, not sure how much runner reworking you did, but it is advantageous to leave (or create if it doesn't have one) an antireversion step to suppress the airflow from going backwards in the ports.
Removing huge casting marks is good, getting the surface too smooth is not. Especially in the intake manifold and ports, you want to keep the boundary layer relatively thick to avoid separation along with fuel accumulation in the bad areas of the port. Also keeping a little turbulence downstream of the injectors is a benefit. Sometimes adding creative turbulence inducing protrusions can help. Otherwise, a 120 grit cartridge roll is generally a good texture.
I stress caution as for shifting the torque curve around much since it is a fuel injected, but changing the rocker arm ratio probably means increasing/decreasing power inversely to fuel mileage
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