70 up charging system upgrade question

Ok so I hooked everything up and I tried to start it. Just cranks and cranks.....let off to run and it fired up. I didnt let it run long as I'm worried about frying something(lots of bare connections) while troubleshooting.
So now I move on checking for voltage drops. Everything hooked up, key OFF and headlights ON.
Battery direct at posts with HL on, 12.30V
1. Batt +ve to main junction at starter relay 9.6 mV. Seems minor.
2. Main junction at starter relay to red/blk splice(old ammeter hookups) 66.4mV. This one seems minor as well.
3. Red feed at key switch to same red/black splice(old ammeter hookups). 11.4mV. Minor or am I wrong??
4. Red/black old ammeter hookups to the HL switch(black/tracer) direct at switch.
This drop is a little larger, 95mV.
All these drops add to 182.4mV which =0.1824 volts.
In my opinion these are minor drops.
Thanks all.