[Tx Firefighter]

Make sure the machine shop put that little galley plug back in place under the oil pump driveshaft area (ish...hard to describe. You should see it when looking in that area. Little feller, about 1/2 an inch if I remember right.). They remove them to vat the block.

It's happened a lot over the years. Forget that little plug and it won't build oil pressure. Big pain.