I decided to change oil & filter in my recently acquired Chevelle. It's a 454 of unknown origin (truck motor maybe). I put in exactly 5 quarts, and after running it, checked the level. Uh oh, it's showing way above the "full" mark-yikes! Looks like a stock GM oil pan. Now, even if supposing an incorrect dipstick, where should the oil level be in the pan? Is there a possibility of a 4 quart capacity pan on some 454s? Any damage possibility from keeping 5 quarts in it? Thanks for any insight!