porting intake questions

I took my street dominator intake off to blast it. There is a guy who races that works where I was blasting it. He told me if i took a dremel and removed a little material around the edges of the ports that i would feel a difference in hp gain. I don't push it that much so I really doubt i would. He said i could possibly pick up 10hp. Would it increase tq? Does this sound realistic, is it worth my effort.. i have plenty of time? You can never have too much hp/tq. He does his own and does his own heads also. If i could get him to do the heads what would be a good price? Is it worth it? Thanks in advance. Btw if it matters it's a 440 believe stock heads (kinda new at this don't know one head from another) does have a pretty good cam (also don't have any specs, it was built when i got it) Kb flat tops, 750 holley.