Re: 72 GMC 2500 - electrically dead!
The harness under the hood breakdown in two peices
One side is engine the other side is headlight harness whick covers your fuseable link alt lights etc
I have not seen new bulk head connectors available separately outside a new reproduction harness
I prefer the reproduction harness over the painful style where you have to run and terminate every connector
You also have to bundle it up to look neat
I am putting a complete new harness in my 72 even though its a low milage truck its still 48 years old
And relatively unmolested wiring
New or old wiring you have to insure all connections are tight loose connections can cause over heating issues
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