The 3.8L is a strong and reliable engine and has been around for a long time. As much as I like it and as wide spread as it's use is, don't think that GM wouldn't replace it with a different engine.
Not too long ago, a couple of GM reps gave some of us at GPG2000 a presentation that showed the 2004 GP with a 3.6L, DOHC, 4 valve per cylinder engine making @ 260hp. I can't remember the torque rating. At that time it was pretty much a done deal. Some of us weren't too happy to hear that, but... what are ya gonna do?
We now know that didn't happen. But... they seriously considered it. So... don't think they wouldn't think about it again.
Marc
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'00 Trans Am WS6 w/ 25K miles - Lovin' it!!
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RIP '99 GTP w/ 41K miles - Totaled in fire
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RIP '97 GTP w/ 192K miles - Totaled when broadsided