I have a Weiand intake for my big block 454 and the only identification I can find on it is the name "Weiand" underneath that it says
"say Why-And" and underneath that are the letters "WCPSQ". I understand the Holley group bought Weiand. Does anybody know anything about this intake manifold? Is it any good? It is a dual plane. What rpm range is it good for? Torque? etc. Thanks, Skip

I suppose you have been to this link,
WEIAND INTAKES (http://www.holley.com/HiOctn/ProdLine/Products/AMS/AMSM/AMSM.html)

The raised part number on my intake is cast on top in the rear I think. course mine is a small block.

I think you can narrow it down by the ports, carb, i.e.

I'd guess "WCPSQ" should be close to "Weiand Action Plus, square bore.

P/N 8013 Weiand ActionPlus / Street Avenger - 396, 402, 427, 454, 502 Oval Port
Square Bore Mounting Flange

Intake specs info (http://www.holley.com/HiOctn/TechServ/TechInfo/AMMTech.html)
Whadda ya think?

It looks similar to an Action Plus but isn't identical. Any other thoughts?