I bought a new cover. From TA. I measured the gears' protrusion from the gasket face to use the appropriate shim for .002 clearance. For example, they stick out .004, use a .006 gasket/shim. You measure it across the gear face with a straight edge and feeler gauges. One side measured .002 and the other measured over .010. I had to use a .005 shim for the gears to even turn all assembled. TA swears up and down they mahcine their chinese raw casting covers to "exact specs... But if you want to pay $450+ for a blueprinted one..." Something is ****y. Either the gears are malformed, the pocket was machined off, or somehow my steel booster/wear plate is warped. All I know is I spent $200 to have less oil pressure than before. I'm going to "surface" the old gears, pump cover and wear plate via sandpaper and either a chunk of flat steel or some plate glass on my counter and try and use a thinner shim.Don't they sell a "repair kit" or "problem solver" type deal for Buicks? A Band Aid for buying a new timing cover......
Short story Long.
If that fails i have new gears and a spare wear plate.