Are Speedmaster Heads Good? I've Heard a Lot of Bad Press on Edelbrock 340 Heads Lately

Over the years I’ve seen enough quality control problems with Edelbrocks and their unwillingness to make things right to never spend a dollar of my own on a set, recommend or sell them.
Everything from big open pockets in the head surface only showing as a pin hole to cracks ten inches long under the exhaust ports, tight giudes and junk valves.
I’m sure the chances of getting a good set are good but the Edelbrock heads were designed 30 years ago and the performance improvements over stock heads were decent but now even the china cast heads can give you twice the performance increase at half the price.