I've got a '92 Civic DX with 191k on it. I'm going to drop a D16Z6 in there before too long. Keeping the engine just isn't a good idea for putting performance parts on it at this point. If you get a compression check and your engine isn't too beat to heck like mine, you could do a mini-me conversion by getting a cylinder head, intake manifold, ecu, and wire harness from a 92-95 EX or Si. You may wanna' grab the tranny too. Check auto salvages for these things (actually under Auto Salvage in the yellow pages).

Good luck.