Filling in Ports to make more power!?!

If you want more power and not spend a fortune, install a nitrous oxide set up, No cylinder head or intake manifold work required.
Kind of, there's only so much nitrous you can put in a stock engine, and has limited use.
For NA power you got low hanging easier to get then there's the harder more expensive usually smaller gains per mod, unless your in a highly competitive race class especially with a lot of rules most go for easier but usually less efficient power.