I would also prime the oil pump to make sure it's still pumping. I have had those stupid *** GM pop on pick up tubes fall off in the oil pan. Stopped the motor so fast it shot the distributor right out of the motor, stripped the hold down bolt threads out of the intake. Put a Helicoil in the intake, dropped the distributor back in and it fired right back up but, didn't have oil pressure. When the pick up tube came off the crank waded it up and stopped the crank so fast and popped then shot the distributor out. I always put a tack weld on those pick up tubes because I have seen it too many times. Why they don't thread in like a Mopar is beyond me...freaking GM.
