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Got the battery cables made up. I crimped, soldered and used heat-shrink tubing on all the connectors.
From the top down they are:
2 gauge positive battery cable with a 4 gauge secondary to fuse block.
2 gauge negative battery cable with a 10 gauge secondary to fuse block.
6 gauge positive alternator cable
6 gauge alternator ground cable
Here is the fuse block mounted on to the flat portion of the inner fender behind the battery tray and under the fender:
Here's the info on it:
https://www.waytekwire.com/item/45977/Littelfuse-880094-LX-Series-Power-Distribution/
And btw, this is the same part as Blue Sea Systems markets for marine use. They call theirs a Safety Hub 150 and it has a clear cover instead of black. I bought the Littelfuse version because it was a better price.
Here's a photo of how I wired it:
The 4 gauge secondary wire attached to the positive battery cable powers the fuse block and connects to the fuse block at the top of the photo.
The secondary 10 gauge wire attached to the negative battery cable is connected to the ground bus at the very bottom of the photo.
For the 4 MIDI screw down type fuses, here are what they power. From the top down:
10 gauge wire to the main fuse panel under the dash using a 60 Amp fuse
10 gauge wire to the HVAC blower motor relay (30 Amp) fuse
10 gauge wire to the stereo amp mounted behind the glove box (30 Amp fuse)
6 gauge alternator wire (150 Amp)
Only using 1 of the 6 available ATO fuse slots and it is for the Edelbrock EFI power. The only ground used on the ground bus bar is also for the Edelbrock EFI.
Here are photos of how I decided to route all the battery wires. As you can see, I used 2 vinyl coated wire clamps to help with the positive battery wire to the starter. I mounted one to the unused mount hole on the front of power steering pump and one on the front motor mount bolt.
Grounds for the body and the frame:
I made up 2 wires with connectors using 6 gauge welding cable. Then connected one wire from the passenger side engine head to the firewall body mount bracket. The other wire is connected on the same point on the bracket and then goes to frame. I had to drill a hole on the bracket but used an existing hole on the frame. I installed 1/4" steel rivet nuts in both holes for the attaching bolts.
With the car powered up, everything I was able to check works correctly so far. The radio, HVAC blower and Dakota gauges seem to be working fine. The blower does seem like it blows a lot of air. At least through the bottom vents it does. I can't change it to the top vents without engine vacuum.
Also got the passenger side fender installed:

From the top down they are:
2 gauge positive battery cable with a 4 gauge secondary to fuse block.
2 gauge negative battery cable with a 10 gauge secondary to fuse block.
6 gauge positive alternator cable
6 gauge alternator ground cable
Here is the fuse block mounted on to the flat portion of the inner fender behind the battery tray and under the fender:

Here's the info on it:
https://www.waytekwire.com/item/45977/Littelfuse-880094-LX-Series-Power-Distribution/
And btw, this is the same part as Blue Sea Systems markets for marine use. They call theirs a Safety Hub 150 and it has a clear cover instead of black. I bought the Littelfuse version because it was a better price.
Here's a photo of how I wired it:

The 4 gauge secondary wire attached to the positive battery cable powers the fuse block and connects to the fuse block at the top of the photo.
The secondary 10 gauge wire attached to the negative battery cable is connected to the ground bus at the very bottom of the photo.
For the 4 MIDI screw down type fuses, here are what they power. From the top down:
10 gauge wire to the main fuse panel under the dash using a 60 Amp fuse
10 gauge wire to the HVAC blower motor relay (30 Amp) fuse
10 gauge wire to the stereo amp mounted behind the glove box (30 Amp fuse)
6 gauge alternator wire (150 Amp)
Only using 1 of the 6 available ATO fuse slots and it is for the Edelbrock EFI power. The only ground used on the ground bus bar is also for the Edelbrock EFI.
Here are photos of how I decided to route all the battery wires. As you can see, I used 2 vinyl coated wire clamps to help with the positive battery wire to the starter. I mounted one to the unused mount hole on the front of power steering pump and one on the front motor mount bolt.





Grounds for the body and the frame:

I made up 2 wires with connectors using 6 gauge welding cable. Then connected one wire from the passenger side engine head to the firewall body mount bracket. The other wire is connected on the same point on the bracket and then goes to frame. I had to drill a hole on the bracket but used an existing hole on the frame. I installed 1/4" steel rivet nuts in both holes for the attaching bolts.
With the car powered up, everything I was able to check works correctly so far. The radio, HVAC blower and Dakota gauges seem to be working fine. The blower does seem like it blows a lot of air. At least through the bottom vents it does. I can't change it to the top vents without engine vacuum.
Also got the passenger side fender installed:

