'84 engine swap

i have a 1984 prelude which i just replaced the original carbs (dual sidedraft) with rebuilt ones. something (warped head or block) is seriously wrong with my engine now and im in the market to replace it with a 86 or 87 si engine. how hard is it to switch from carbs to fuel injection? or should i just reuse my rebuilt carb? anything helps.
thanks

what did you do to your carb engin to get power out of it

the engine was stock and didnt run when i got it (christmas present) and i was told the carb was the problem and sure enough it was a problem, but obviously not the only one. so i have nothing new on the engine except the rebuilt carbs, distributor and spark plugs/wires.