G2 engine troubles

[mncdriver]

Help please. I have a G2 that ran decent. Thinking the clutch was making a rattling noise, I put it up on jack stands for a check out. Ended up ordering a clutch removal tool, drive clutch, crank seal and cover gasket. The engine is caked with 30 plus years of oil, dirt and debris. During cover removal the camshaft slid out. I reinstalled the tappets and aligned the cam up with its marks. Reassembled cart, topped off oil, now it won't start. Pulled valve cover and checked to make sure valves are opening. Found the push rods not properly seated under rockers. Fixed and set lash(.005). Still no start. decided to pull cover again and check timing marks. All marks matched up and balance shaft seamed in the right position. With valve cover off I can watch the valves open and close at what seems like the right timing. Borrowed compression tester and have no compression. What am I missing? Any help will be great.