i don't blieve the dash is plug and play, but if it does turn out it is, i would suspect you'll have to use all the wires from the si clip.

i beilieve the 96-98 civics had mechanical climate controls, while the 99's on received all electrical.

unless you got the fuel tank with the clip, you probably do not have the fuel pump.
you need the fuel pump.

newer fuel filter wouldn't hurt.