1986 Toyota Camry oil pressure

I got this Camry from a friend that has had the car for about 15 years. 9 years ago he decided to rebuild it. He replaced the rings, bearings, pistons, oil pump and had a valve job done on it. He also had the transmission rebuilt. It has been setting every since. We put the engine and transmission in and had trouble starting it. I found the timing to be off 2 teeth. It started and ran but the oil light would take a while to go off then the engine would quite down and for the rest of the day would go right off. I drove it for a 1000 miles and it had a miss in it. I had a mechanic check it out and he said there was no exhaust pressure or no vacuum. So I took the head off and had a machine shop check it out. They found 2 valves that were bent. They reground the valves and I put it back on. I have no oil pressure at all. I took the oil sensor out and checked it. No oil. I checked the bearing clearance and the machine shop said they were within specs. The relief valve seems to be working ok. I put a toyota oil filter on after 500 miles but have not taken it off since. I put 10 w 30 oil in it put the pan back on still no oil pressure. The guy that overhauled it said he thought he had an issue with putting on the pulley. Do you have any ideas? Thanks Steve