I'm talking about different dowel pins. My intake manifold has dowel pins where it mates to the cylinder head. I don't think it's common to do that, but I thought I'd ask just in case.
I would try restricting the oil to rockers at the oil hole in the cylinder of your new BBM's. I don't know if that is the root cause, but it's so easy to try that you might as well try it. I like Jay's idea of filing a flat on a round rod and sticking it in there.
JMO,
paulie