Trick Daddy said:If you don't know what to do and what to have some fun, just go ahead and mess around with it. That's how most folks learn to get comfy with engine work. Don't be all scared about it...just do it. Tools needed...just normal tools to remove cylinder head and valves...yes, take them out...cam, everything. The surface that you do not want to touch at all is ANYTHING INVOLVING THE VALVE SEAT...at least to start. If you want to get that close to danger, just use JB weld, not JB QWIK, the real slow-setting stuff, and smooth out the transition from the valve seat to the port floor and ceiling.
Other than the above caution, you will need a dremel tool with some sanding drums..with plenty of spare sleeves if you are just getting started.
To get started, use your dermel on a low setting and get the feel for how it eats metal. Start by smoothing out the casting line on both sides of the intake side. Just focus on getting rid of the line without enlarging the intake port. You will see a bunch of shavings, but you aren't enlarging if you just make sure the whole intake runner is evenly smooth with an 80 grit sanding drum. If you use a light touch and don't let the tool sit in one spot, you won't open it up if you are in there for 10 minutes....just pay attention to what you are doing. Sanding drums aren't a "one slip and you're done" thing...unless you get a piece of the valve seat.
Smooth it out so it all has the same finish and you are done for your skill level.
Performance gain - minimal. Confidence gain - moderate.