I have a 155,000 on my 99 GTP, its been modded since 55,000 (before people scanned and gave a damn about KR at that). It hasn't let me down yet and if it did I could only blame myself. I ran the hell out of it the first few years. I always properly maintained it though. I'd put a 3800 up against any motor as far as realibilty.
I think the 4T65-HDs are damn good as well. Considering the abuse most people here give them, they hold up damn well. I'm still on my original and I think thats due to proper maintance (pan drop every 30,000 miles)...
