LA small block timing is suddenly way off

Or time it by ear for that matter.
-In response to post #19; yes: new chain, and usually gears,and retime the cam.
-edelbrocks dont have a PV ( Power Valve) like Holleys.
-It sounds to me like yes, youre stuck. #1 thing is this; reread this thread from the beginning.Maybe a couple of times until you understand whats being said. If it doesnt sink in, dont be discouraged. We all started out knowing nothing. If you build a house on shifting sand eventually it will crumble and collapse. A house needs a firm foundation.
-We are out here in the wild blue yonder. We need to know that the foundation is solid or we are just chasing our tails. We need to know that the TDC mark is exactly where its supposed to be. We need to know that the cam is near to where its supposed to be. And that the rotor is correctly phased and that the firing order is exactly correct and that the cylinders are all contributing nearly equally. Our contribution is diagnostics. Your contribution is to perform the tests and report back. Until you report that the foundation is built and secure we cant begin to build the rest of the house. Now read, do, and report.