Fresh SR Swap Starter/Severe Voltage Drop Issues

[240srCoupe]

I'm having some severe starter/voltage drop issues with my fresh S13 redtop swap. When I turn the key to the "start" position the voltage drop is completely ridiculous, it goes from around 13v to less than 8v when I turn the key to the start position and I cant pinpoint where this drop is coming from. With the KA this wasnt a problem, the starter would turn with the key and there was no clicking issue so I assume no voltage drop issue. All the lower wiring is the same as before, just hooked up to the SR starter and alternator. The car was an Auto, engine wiring done by wiring specialties, p/n switch is jumped...as far as any other wiring in the car its all original and has never been touched. All gauges are wired to the radio circuit (switched 12v), and I have a Viper 5701 alarm system that is installed correctly as well. I've made my own "T" harness for the ignition section of this alarm and with the alarm connected or disconnected the voltage drop is still there.

Ive checked the voltage drop across all battery connections (actual post to terminal, post to distribution block under hood, distribution block to starter, etc) and there isn't an issue there. It's simply when I turn the key to the "start" position...massive voltage drop in that switched circuit as shown by my voltage gauge in the car as well as my DMM.

Now whats going on is...I turn the key to "start" position and theres an enormous voltage drop with or without the starter hooked up, greater than 5v. Battery is in the trunk using 2 gauge wire so that shouldn't be an issue. I thought my starter was bad so I had it rebuilt, rules that out. When the starter is in, and the switch is turned to "start" it may or may not turn over...when it doesn't turn over it just clicks, back off the switch, turn it again, click...will click every time I turn the switch to "start" and the voltage drop exists whether or not the starter is in the car or not...this is so frustrating as I'm trying to get this car on the road in the next couple weeks.

How can I find this voltage drop? Can anyone shed some light on this situation? Any and all help is appreciated.

[240srCoupe]

Voltage drop isn't throughout the starter circuit. I have +12v power from the small starter solenoid wire when I turn the key to "start" or when the ignition switch is set to "on", no voltage drop there what so ever...no power on the other side of the plug to the solenoid with switch to "on" and most of the time still nothing even when I try to start it.

I'm set on bad starter even though they said it has been "rebuilt"...