Battery relocation wiring question (already did search)

See http://www.mustangcentral.net/tech/alternator.html for the answers you need. Nice description & good pictures too.

Rear mounted battery wiring.

One 1 or 1/0 gauge (or larger) from battery positive post to the battery side of the front mounted starter solenoid (relay). You may wish to place a battery shut off switch in the wiring between the battery and the starter solenoid. Be sure to remove the old battery cable that was connected to the battery. Do not remove or move any other wires. That includes any wiring for the alternator.

Follow this plan and you will have zero ground problems.

One 1 gauge or 1/0 gauge wire from battery negative post to a clean shiny spot on the chassis near the battery. Use a 5/16” bolt and bolt it down to make the rear ground. Use a 1 gauge or 1/0 gauge wire from the rear ground bolt to a clean shiny spot on the block.

One 4 gauge wire from the block where you connected the battery ground wire to the chassis ground where the battery was mounted up front. Use a 5/16” bolt and bolt down the 4 gauge engine to chassis ground, make sure that it the metal around the bolt is clean & shiny. This is the alternator power ground.

Crimp or even better, solder the lugs on the all the wire. The local auto stereo shop will have them if the auto parts store doesn't. Use some heat shrink tubing to cover the lugs and make things look nice.

The computer has a dedicated power ground wire with a cylindrical quick connect (about 2 ½”long by 1” diameter. It comes out of the wiring harness near the ignition coil & starter solenoid (or relay). Be sure to bolt it to the chassis ground in the same place as you bolted the alternator power ground. This is an absolute don’t overlook it item for EFI cars

Im subscribing just cause thats awesome info jrichker and i plan on moving the battery soon.

Did it like this years ago, works perfectly.