High Volume Oil Pump?

Back when I had my 383 Super Bee I usually ran it with 5 quarts of Penn 50w (in the summer) and had no problems.....except at the track. With the HV pump in it twisting 7000 it would empty the pan. To cure the "slow return" I ran an extra quart.

However, you aren't talking about a WOT 13.40 pass. I haven't owned enough small blocks to have ever even thought about looking at the stick while running to know if there is an issue. But if it were a big block and there was no oil in the pan at idle I'd be tearing it apart looking for restrictions in the return path.