There have been plenty of people I know with overbored b20's without problems, but it seems for every 3 that don't, there is 1 guy that does. Maybe you aren't that guy. I'm building 2 almost identical over bored b20 vtecs right now. I don't think that either of them will have problems. Too much effort has gone into all my builds, and over the years all of them still run strong. Lets hope yours isn't destroyed.

Also, do you want a fully built Ls head with all the Crower goodies you were wanting?