coil packs either (unless you want to). The plenum runners have enough room for slipping a sling underneath and it's pretty hard to damage those injectors.
FYI -- When doing this way - be sure that the bolts down the center of the plenum as well as the Golden Brackets (one each side of the plenum that secure the upper plenum to the lower block) are in-place. Just mentioning in case any of these were removed while engine was out of car....