Okay, i have been constantly having timing problems with my chevy 350. In order for my car to run without grinding the starter, i have to run the car way retarded. Once i get it running i adjust the timming and shut the car off. When i try to start the car it grinds really bad. When i run the car retarded it runs like crap, also when it shuts off, it keeps firing and rocking the car constantly then stops. I can not figure this out. What seems to be going on with my motor, i can not get it to start good, run good and shut off good. Thanks