just found this to make your own design and custom wires... IF you don't want to make them by yourself whcih is way cheaper as far yo0u get the toolings and materials
https://powerwerx.com/single-conductor-custom-cablealso dual
https://powerwerx.com/dual-conductor-custom-cableyou can make a new fresh wiring between alt and batt going through the ammeter with quick disconect wires in the middle meeting your needs.
separated wires
1/4" eyelet for ammeter ends
3 feets lenght 10 gauge, one red one black.
Black wire with 75 amps powerpole end
the red one with 45 powerpole end
one extra 45 amps powepole end and 3/8" eyelet terminal for the new 14 gauge fuse link
alt black wire with 75 amps powerpole end, 5 or 6 feet ( which ever the lenght is the engine bay need for the alt, I don't have the measure ) wire and 3/8" eyelet terminal
grommet on firewall...
done.
just an idea
and of course A GOOD ALT!!!! if money is not a problem Tuff stuff 100 amps alt is my sugestion which is my dreamed alt ( which I can't afford by now )
EDITING ONCE MORE...
also the 1/4" eyelet terminal and bare end, maybe 1 feet long or a bit more, black wire ( 12 gauge is enough like factory ) to feed the factory splice into the underdash harness
and forgot you got a 71, where the starter relay is at a side of the batt... so will need the powerpole end extension to reach from firewall up to fuse link ( maybe 4 feet long ? )... or get the amm/starter relay section that long instead getting a powerpole plug leaving the firewall... maybe 6 feet long ?
