I have a few Buick Rivieras lined up to look at as daily drivers. Also looking at a 2004 MC SS, but I am curious what to look for in these cars? One is a 1995(S/C), another a 1996(N/A), and a 1998(S/C). What should I look for on these engines and transmissions and heck the xcars overall. I figure you guys are the 3800 gurus and these all have 3800s in them.