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From: Daven Anderson
Email: 1961fury<at>Leapmail.net
Remote Name: 199.182.46.18
Date: August 16, 2003
http://www.holley.com/HiOctn/ProdLine/Products/AMS/AMSM/7503.html The Weiand/Holley 7503 aluminum intake will save lots of weight over the stock 4-bbl. manifold. The catch is that the Weiand is a single plane design and the dual-plane design of the stock 4-bbl. manifold is superior as far as low-end torque is concerned. The 7503 sits very low as well, so it doesn't have the top end power advantage (over dual-plane designs) that normal aftermarket single-plane manifolds have. (Most aftermaket single-plane manifolds are high-rise designs to maximize top-end power) There were other aftermarket intakes made for the poly as well, most notably the rare Edelbrock alum. manifold with a top for three 2-bbl. Strombergs.
