That is what I was thinking but IIRC, those that have ported the heads found a better set of ports to grind on for better, higher flowing ports. *I think* MRL has worked on said heads. Perhaps OU812?
He had some procomp heads there when I was dropping my engine off in 2013. Said they looked better than the edelbrocks. Now, none of us know if they used really high quality aluminum or not
My edelbrocks were made in 1997 and even the casting and machining quality on those wasn't exactly fabulous. IIRC one of the exhaust bolt holes was drilled straight into the port on the end exhaust port.
Also even my used heads had some "too tight" valve guides. Of course since I got them used I had a valve job done and had everything corrected. So, if you had the heads either looked at or bought them bare, then I think you can do well. I'd probably be more worried about the machining quality on the heads than anything.