The six oil pan is not well baffled. I dont know about the Taxi, but in my early Nova's, if I am over a quart low I can starve it for oil on turns or a hard launch (and these are 1-barrels with stock size tires...)
If you have a good oil gage that is a good test - start with about 4 quarts and take some hard turns - when you see it starving, you know that aint enough - should be 2 quarts above that.
Of course best is to have the pan off & figure it all out that way, get the pickup right near the pan bottom
