Yeah, if someone does a search with a similar problem and the original thread pops up, it would be good if the soltion were there, instead of a stand alone post.
Glad you figgered it out.

BillyC wrote:

I hate it when a guy posts a problem but doesn't repost to let us know how he solved it. Didn't want to be "that" guy so here ya go...a while ago I told ya'll about a problem with my 66 coupe 289 cutting out under hard acceleration. I got a lot of suggestions and believe me I tried them all and then some. I disassembled and cleaned the carb, reset the floats. Checked plugs wires and plugs, removed the Pertronix ignition and installed the old points and coil, put the Pertronix back on etc. you get the idea. Long story longer.. one of the first suggestions was the PCV valve but I figured it was ok . Well it wasn't. I replaced it today and problem solved. Actually it runs better without it but it's fixed anyway. Sorry for the long post but there are some lessons to be learned here I guess.

If you have a healthy cam and use a stock PCV valve, you may not have enough vacuum to operate the PCV valve as it was intended.  There were models that originally had PCV valves with a different spring (even some w/ no spring and just a small orifice) that were designed to work better w/ the lower vacuum signal.  If you look thru the part store listings you'll see them listed as "high performance."  You can test them w/ a vacuum gauge to see how the open as opposed to the other valves.  Or, you can opt for the Wagner adjustable PCV valve, but it's about $130.