Had the Weiand Action plus on my warmed over 383. It was OK, looked alot like the stock intake. Put a Weiand xcelerator on and it seemed to have a more upper RPM power, and slightly less low RPM power. Likely a decent setup if I was running a high stall converter, but with the stock converter, it was a bit slow off the line.
This was before the Edelbrock RPM was developed.
I would likely use the RPM intake now.