I cleaned up the runners on my intake manifolds today. I'm waiting till later tonight when its a bit cooler to do a 3rd gear pull.
I was able to smooth where the throttle body transitions to the plenum pretty well. After that all i did was take down any lips from where the 2 parts are formed together.
For the lower, I just smoothed out all the casting flash on the side of the ports and port matched the openings.
Next week I up the MAF tube size to 2.75" and get a retune for everything.