you have no conecpt of VTEC at all.
and notice, there's no dash. v-tec doesn't exist. neither does VTECH or V-tech.
and on top of all things- STAR TYOUR OWN GOD DAMN THREAD WHEN IT DOESN'T RELATE TO THE TOPIC AT HAND.
now, for b20/ls heads- the difference are:
cams on the b20 are a little less duration.
intake manifold is that gay giraffe style that wont clear a civic hood on a b20b. the b20z IM will. however, the b18b IM out flows both of those.
A gsr IM intake won't fit an ls or b20. the bolt pattern is different. plus, the ls ecu doesn't have IAB controls. so basically, no.