I usually don't get perplexed but.. New Starter, New slave solenoid, Tried a new key switch which didn't change anything, voltage and grounds all good on everything I have checked, battery, block ground etc. Voltage at key, with key-on at solenoid, at starter, at starter solenoid..Neutral safety is good. There is just a click when engaging momentary of the key-switch. Am I missing a fuse or breaker somewhere that would interrupt the circuit? I figured I wouldn't even be getting the 'click'. The 50 amp breaker looks a little crusty, I'm about to try that next..Or at least jumping it. The engine fired up with remote switch on the starter and ran fine. Only work on a handful of these and each one more a pain than the last.. Any help appreciated. I am almost certain I'm overlooking something electrical between key and solenoid/starter. Any help appreciated!! Serial starts with 0K0 if any relevance.