[ERA Chas]

Nothing suggested here will give the meaningful improvement in power you seek except a cam change accompanied by head improvement or change and carburetor improvement, as Brent suggested. The other ideas are fine to augment those basic changes.
Those changes will alter the docile performance you now enjoy so be certain what your desires are.
Start by going for rides in cars with several levels more power than you currently have. Then decide what you want to live with. I have in mind a certain blue/white car with magnesium wheels as the upper end of the scale for power in proximity to you.
The actual parts and procedures are easy to ID and source from the forum then.