My trans am wont start anymore!!!!?

so i recently did a top end on the car it was running perfectly fine drove it and everything..xcept had an oil leak at the timing cover so i took of the intake pipe alternator water pump and steering pump harmonic balancer and timing cover thats all didnt mess with the timing er anything .nothing else didnt unplug anything electrical and so i fixed the leak today with a new timing cover gasket put everything bak together as usual and now the fuken thing wont start! wtf! could messing with the harmonic balancer when i took it off mess up the timing???? i just dont understand what it could be i chekd everything electrical everthing looks good. it turns over just fine just wont fire up fresh plugs too maybe its a wire er sumthin idk