Ground wire hookup ?

[bigcahoona]

ok I want to add a 4g ground wire to my 5.0 and the small strap that's already from the engine to the firewall is pretty hard to get to. I figured I leave that and put the 4g in another location. Where's a good spot to hookup to and get a good ground.

 

[jrichker]

The secondary power ground is between the back of the
intake manifold and the driver's side firewall. It is often missing or
loose. It supplies ground for the alternator, A/C compressor
clutch and other electrical accessories such as the gauges.
Any car that has a 3G or high output current alternator needs
a 4 gauge ground wire running from the block to the chassis
ground where the battery pigtail ground connects.
The 3G has a 130 amp capacity, so you wire the power side
with 4 gauge wire. It stands to reason that the ground side
handles just a much current, so it needs to be 4 gauge too.

The picture shows the common ground point for the battery & alternator.

Picture courtesy timewarped1972

 

[DmnStr8]

I attached mine between the spot on the block where the battery grounds out and one of the front sway bar bolts.

I haven't had any problems with it, so hopefully this is an acceptible placement.