Typically I don’t recommend porting TBI heads. But if you have more time than $$. New heads are not cheap. Here is some videos for porting the TBI heads. I didn’t do the videos. I have only watched some of the videos to make sure its something that I wanted to put on my site. This work is not going to get TBI heads to make the same power as vortec heads but will certainly help them out.
PART 5: Also has porting Edelbrock 3704 intake in this video.