They are the same as pro comps. If they are the 210cc versions like what I have you'll really need a hot combo to utilize them. They are copies of Victor Jr.s. If I could do it all over again I would have went with some TFS heads instead.
I just bought a set and put them on over the weekend. Just have to drop the engine in next weekend. The shop I went to put some really high end valves and springs in for me. Labor+Tax+the heads and the upgrades on them was about 900 total. They should be a good high flow head. The set I got are very high quality and SO FAR I am happy with the purchase. When the engine runs etc. that will be the final verdict.