Sorry I haven't updated this post, but the problem is solved. It was Sludge. Pulled the valve covers, every low spot had about a 1/2" of Black Toothpaste. Clean the heads out real good, dropped the oil pan to find the same thing. A nice sludge ring around the pickup screen. Degreased the pan and valve covers and gave them a fresh coat of Buick Red paint. No more oil light, after a lot of driving. :TU: Also while I was at it, new starter, PerTronix Electronic Ignition Conversion kit, Flame Thrower Coil & Wireset. New Battery cables too. Running Sweet now! I still have a small rear main seal leak though Dave...
Sorry, forgot to answer this. It's #55 Turquoise Mist Poly. Here is the 69 color chart: http://www.buicks.net/years/69/69paint.html Dave...