I'm a regular poster on a couple of hot rod oriented boards - Rodding Roundtable (RRT) and Jalopy Journal's H.A.M.B (HAMB) - and found myself to be the Lone Ranger as far as running late Buick engines went. A bit of a newbie here, but I'm finding it interesting. Here's the addresses of a couple of articles some of you will find of interest. They're from the Street Rod Stuff board and written by a very knowledgeable guy named Steve Jack. Also known as HotRodsRJ in some places. The article I wanted to find was a mechanical fan/electric fan/CFM ratings/Dyno HP loss comparison article posted at both the RRT and HAMB. About 2 years back I believe. I looked and can't find them so you're on your own there. In any event, the articles at the addresses below are a quick and interesting read. http://www.streetrodstuff.com/Articles/Cooling/More_Cooling_Suggestions/ http://www.streetrodstuff.com/Articles/Cooling/More_Cooling_Suggestions/