i think u should just drop a b16a in there.. will be able to pick one up for around $2500 - $3500.. and around $1000 - $2000 labour.. u should also change your brakes n a few others costs will be involved

on this forum look under the "civic/crx" section.. there should be a thread near the top of the page called "B16 FAQ" give it a read

for frankenstien conversions also try searching "b20vtec" ive recently been doing some research on it

good luck