Missed on this combo?

Just like having a custom cam built for your combo will out perform and off the shelf most times. So will having a professional porter, port a set of head for you.
I have no ground to judge here but i'm going to any ways.
A Professional ported, will know what CSA your port/ head needs to be(and port velocity is part of it) for the cubic inch and rpm that is run.
I haven't done any backward calibration to see if them bloomer head were just plain and simply too big for what your are doing.(I doubt it) And i'm not going to. But the one that ports your head should be thinking and explaining this to you. Just keep that in mind.

Reading the thread over at morparts. being on the outside of the conversation,...don't think they are beating on you to badly.

Me personally, i wouldn't go and find another head and have it ported..... Not Just Yet. I would cut up some cardboard and throw it in the valley of that block and wrap a plastic bag around it.
You have a ride still to play with, so it's not like you can't still race and have some fun.
THERE IS NOT A BETTER TEST BED, FOR THEM HEADS, AT THIS PRESENT TIME,....... Just saying.

But then again, i would want to invest the money back in quickly, or my wife would find something/place that money need to go to, that was NOT car related!:)