I know my thoughts, and sometimes I'm out in left field. I know Mark is pretty damn good with the GM ovals and he posted in this thread:
http://www.chevelles.com/forums/13-p...402-bbc-2.html
Post #24
"You don't put 2.190 intake valves in a 4.155 bore, unless you want to kill the engines potential."
Now would I tell him to toss his L-78 heads if he had them, probably not. Will it make power, YEP, been there done that. I'm was just pointing out for what he's looking at doing, and parts he has, with a limited budget, the $$$ would be better spent to port what he has and keep the 2.06's.
Eric, you know how to make some power too from what I've seen. I just think the return on investment might be better served keeping his 2.06's? This is partly what these forums on different site are meant to do. Open up "friendly" discussions as there are always many different way to reach a given result. And I would have fully agreed with a MIN of 2.19 intake on a 30 or 60 over 4.250 block. But with this narrow 4.155 bore, limited budget, and not shooting for the moon, I just think personally I would go with a port 2.06 over a non port 2.19 in this head ON THE BORE SIZE.
It's ok if we disagree, I'm Canadian and your an American. It happens LOL