[MrPbody]

Well, again, I must have halucinated all those dropped valves and burnt rings. When I first started in the business, the nail-head was in it's "rebuilder prime". That is, they were approaching 8-10 years in service, and were beginning to fall out (the mid-60s stuff, not the earlier ones).
I did NOT define "muscle car", the guys that sold the first ones did.
Grand Prix IS a "personal luxury car" according to Pontiac literature from the '62 model (the first one, a year ahead of Rivvy). Okay, it may be an "E-body" in the late '60s. But it's still the same, as all the suspension parts from a Rivvy fit a GP, '69-'72. Toronado is FWD, true enough. It is still a "personal luxury car".
You guys miss the point. Buicks are wonderful cars. I said that before, and I like them. ESPECIALLY the early Rivs. But I don't see them anywhere near the level of performance the other GM divisons had at the same time. Saying a Rivvy could run with a Catalina (in '63) is like saying the same '63 Cat could beat up on a '67 GTX with a Hemi... Emotional and not realistic.