Go back a while... new (rebuilt) starter works great. Mid year sometimes takes 1 or 2 tries to get it off dead spot.

Saturday... car starts, but it's click-click-start; voltage low on voltmeter, maybe alternator gone bad, worry about that after alignment

Sunday... car starts, click-click-start; voltage reads fine after remembering to reconnect turn-on wire to alternator

Monday... car no start- starter doesn't spin. replace starter. starter no spin, maybe battery low, charge battery overnight

Tuesday... 5:49am, battery 12.9 V, starter no spin.. bypass factory starter relay - starter no spin. Shim starter in case of bind - starter no spin.

Current dyno 0 hp/ 0 tq

What do I need to check?:
1) Resistance of battery GND to starter/engine block
2) Voltage at starter motor no load/load
3) Resistance of thru panel connector

AARRGGGHHHHH!!!

So, uh... I hear YOU guys are racing on Saturday.