I did A LOT of research on this and I found that Goodmarks quality has fallen off quite a bit. AMD appears to be the best steel hood on the market at this time. I have personally ran a Glasstek 4" on my old 69 Chevelle and it was top quality. IMO you can go wrong with either AMD (Steel) or Glasstek. (Fiberglass) Tamaraz Auto sells both and they are very reasonable on price. Got my AMD steel hood delivered to my door for $523.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=260145748208&viewitem=&sspagename=STRK%3AMEWAX%3AIT