FYI, the S13 KA's do have oil squirters...I've opened three of them ('91 blown up race motor, '92 block donor for new race motor and another '92). All of them had piston oil squirters...a couple were missing/shredded in the blown motor though.
My biggest fear with more power would be rods. I've already put a rod through the block on two motors...one race car one street car.
Are the rods any different from S13 to S14?