You just scratched the surface, but come to a great point -- you need to research a bit so you know which one to get. In general, the later ones have all the quirks and bugs worked out. Rather than a Quad-4 you really want a 1996-2001 "Twin-Cam". Same engine, new name to mark all the improvements. Any of those should be good to go. The rodder community calls them all Quad-4, thus a bit of confusion. I'm pretty sure the one the guy on hotrodders.com is building is a 96-97 model, but I'll ask. The Ecotec appears to be based on the Q4 design, though of course thoroughly modernized. -------- Date: Thu, 21 May 2009 23:52:14 -0700 From: tom jennings <tomj@xxxxxxx> In the spare time I don't have, I spent a couple hours in the last week hunting info on the Quad 4 motor... OK it's only reading, but anecdotes from rebuilders, hot rodders, etc...people in a position to actually know, not blind fans nor haters... It's a mess of a motor. It sure is pretty though! And makes a lot of power, and ... but there's like 6 blocks, 4 cranks, 3 rods, not just because of the two or three different displacements, but because of design flaws, head cranks, weird gasket problems, ... -- Frank SwygertPublisher, "American Motors Cars" Magazine (AMC)
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