you cant just plug in the si harness you have to convert your DPFI harnes to MPFI,
if your talking about not having money, then dont do this swap, because you are gonna have to spend money to make it work
your gonna have to get aftermarket mounts hasport, hcp, etc
your gonna need to get hasport linkage, or your gonna have to modify the integra linkage
your gonna have to get 90-93 integra axles
your gonna have to crx std or si hubs
your gonna need to probobly get new brake rotors and pads for those hubs
your gonna have to pay an exhaust shop to match the b16 downpipe to your exaust, or you mine as well get new exhaust, you dont want that b16 breathing through a straw.
and unless you trust that dude in japan your gonna wanna get a new timing belt, waterpump, spark plugs, distributor cap and rotor, plug wires, oil and filter, coolant, new clutch, honda MTF, your looking at 1000 to roughly 1200 bucks in parts.
these isnt something you tie in with a rope, pop a couple broomsticks in the tranny, wire up the shifter with a coat hanger, rush over to your girlfriends house, and then off to the street races.... then again i could be wrong... give it a shot