Hi guys I know this is an old post hope someone can help me here so I put back a gen v block with vortec heads on non adjustable rockers. And there seems to be a 100 though gap and if I bottom out the rocker bolt it keeps the valve open. What could of happened and it came form an running engine just the crank was bad. So replaced that and it started now it doesn’t and I see all the valves are open and 100 psi compression but once the valves closed got 150.