1995 Pontiac Firebird Formula won't start (5.7L LT1 auto )?

Alright here's the situation. I had fuel injector problems a while ago and replaced the injectors. The car sat for a few weeks before I tried to start it. When I tried to start the car all that happened was a clicking noise. I asked around and came to the conclusion that the starter was bad as it wouldn't turn the motor over. I replaced the starter, installed a new one, and I have the same result again. Car makes a clicking noise of the solenoid kicking out of the starter but does nothing else. The block isn't seized as I turned it by hand with a socket. I've tried everything I can think of. Maybe some chevy guru can shed some light on this. Thanks