87 chevy camaro 2.8 v6 manual.. starter and solenoidare good.. fusible links are getting power on both sides of wires.. purple signal wire is getting power at crank. battery checked out as bad at pepboys yet the horn blows loud the lights are bright and everything seems as if they are running at high power.. fuses under dash are good. ...it only cranks when it feels like and it doesnt even click when it doesnt start.. i heard that when the clutch start switch is unplugged you can crank it without putting the clutch to the floor. what could it be? can a battery really be that bad?..
starter and solenoid have been checked

 

so when you try to start it it just doesnt do anything? if you leave it alone for a bit does it crank?

 

it cranks when it wants to.. other then that. it doesnt evenm click.. but i just put a good junkyard battery in it and it cranked 2 out of 2 times.. im hopeing that solved it.. if i solved it then all i need now is a mass airflow sensor and the distributor timing needs to be adjusted.. the car wont start cuz the distributor is not set right