Drums_right_now

Ive been doing a little research about this problem I am having. On my way home from work the other day my 96 impreza 2.2 started to be sluggish. It doesnt seem as if the engine itself is the culprit, more along the air fuel mixture coming in. I have recently replaced head gaskets, upstream 02 sensor, as well as plugs and wires. The car doesnt have any problems revving, but as soon as power is put to the wheels you can feel it not pushing as hard as it should. Any other suggestions on what could be leading to the hesitation it has?

Alright, so I'm doing research before I endeavor on my journey to raising the height in my Impreza. Everything seems petty straight forward and I get how it has to be done, am looking for a few more answers. Are all generation of forester struts need an extra bolt hold drilled or are the top hats the same? Also when doing the lift what other variation of subaru parts can you use? Such as grabbing trailing arms from a 00-04 legacy instead of a legacy outback? Making sure that I have all the info I need before I start this.