[chevy3600]

I want to route a ground from the firewall to the cab under the dash. I guess you would call it a terminal block. However it should extend into the cab where I can ground several wires without running them separately through the firewall. I believe I saw something like this a few weeks ago but I can't remember where.
Anyone know where I could find this?

[C-10]

I think I get it. Maybe. You are negative ground, right? Just ground to the body where necessary.

If you are talking about a terminal block to distribute fused positives, then check out the attachment.
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[75gmck25]

It sounds like you just want to provide a convenient ground point under the dash. You can ground it on the passenger compartment side of the firewall instead of running a wire to the engine compartment, unless are trying to resolve some audio problems. Some high power audio equipment works better (less noise) with a dedicated, direct ground connection to the battery instead of using chassis ground.

The page that C-10 provided shows a couple of examples that would work, and there are quite a few other brands out there. The auto parts stores usually have a few types in stock. Another source is car audio installers, since they need good grounding for the equipment they install.

For your application, make sure you are getting a distribution block or junction block, where all the studs are connected together to provide a common ground point.

Barrier blocks look similar, but in most cases they connect each pair of wires separately, and you don't have any common power or ground point.

Bruce

[heyjude076]

This is a master ground block I use on motorcycles and is a great company to deal with (no affiliation)

http://www.electricalconnection.com/...tion/02207.htm

[yknot]

Today Grounds are more important then ever, these newer computer controlled cars, depend on the traditional role of grounds, and for control of Radio Frequency, and electrical noise. The high frequencies used by the new computers can cause real problems when allowed to go un-checked, this is why are electronic equipment plugs have grounding.
What your referring to is the general grounding, that is needed to get one a full connection from one side to the other side of a battery's circuit. A common Ground type system. Many companies, including Painless Wiring, and Ron France Wiring sell Ground Kits, that use short pieces of Buss, to make several connection to. These are great ways to bring many separate grounds together, then simply take one larger cable out to the battery, or other acceptable ground location. While I can't help but to believe these kits originated for the Fiberglass guy's, they do make great addition to any project, regardless of your Grounding needs.

[302 Z28]

You can buy bulkhead connectors that install through a hole in your firewall.

Vince