85 civic 1.5 ew1 carb

im in the search for more power out of my 85 civic. ive bored my jets a few (mm) ive done full exhaust manifold back an built a cold air intake for it. ive advanced the timing. i dont wanna go to a bigger carb cause it is an old car an its jus a winter beater. if u hav any ideas plz let me no it would be much apperciated