[Sphinx]

I like that you replaced the vacuum lines. good idea. That click click noise is the starter solenoid engaging the gear on the solenoid to the corresponding gears on fly wheel, to begin to turn it in order to crank the motor. after it engages and goes to turn the motor (due to a low voltage situation) the power drops off and it immediately disengages again. then the process repeats causing that clicking noise. just to be safe i'd get the battery tested... its very cheap to do. also to prevent further corrosion on the terminals i suggest smearing on some petrolatum jelly (grease) ky works fine. it will stop buildup by not allowing moisture near the terminals. good job on fixing the ground. Good luck with it-