I knew I was experiencing deja vu reading this thread. Take a look at this one with what appears to be the same culprit ... Turn 2 at Willow:
IT'S OVER - bearings toasted - FFCars.com : Factory Five Racing Discussion Forum Eddie even had the same symptoms of no
oil pressure then back to normal:
let's try a new oil pump - please recommend one (story included) - FFCars.com : Factory Five Racing Discussion Forum Good look with your fix!