I did the obvious once, and poured 3 quarts of new oil without the drain plug. I also, on an old 83 tbird, changed the oil and refilled, drove two or three miles, noticing the engine feeling sluggish. Went back home, checked the dipstick only to discover I was way over filled, by about 3 quarts. This model tbird had a "U" shaped oil pan, to clear the tie rod, or steering linkage, with two drain plugs. I only drained out of one. No apparent damage done. Never sure how that oilpan/oil pump pickup worked.....
I think I also put slick-50/teflon solids in that tbird...............
I think I also put slick-50/teflon solids in that tbird...............