[macshpman]

I would have to say that if you ran that vette you must know some of the same racers I do. Doug Jounis must come right to the forefront as he also ran a corvette in that time frame. How about Phil Miller, Smiley Smullens, Ray Blake, Art Gallent, Bill Douglas and I am sure that you can name a few others. Also Sunset Bob you should a good oil in that engine that still has a high concentrate of Zinc and Phosporus. Brad Penn SAE 40 or SAE 50 would do the trick as you are more concerned with oil pressure and protection then gas mileage. You did mention that the oil pressure drops after a hard run which would suggest that it may be a temperature related problem. As oil increases in temp it thins and builds less pressure. Could it be an oil cooler that is losing its ability to cool the oil. That coupled with wear on the engine over the years could be causing the problem. Just a thought.