Firewall Junction Block 1984 K30 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tance52 · 02-26-2021, 10:32 AM

I'm restoring a 4x4 K30 and I noticed some pictures show the firewall junction block with a connector between the studs (like in the picture) and some don't. What's up with that? Is it necessary? Thanks for your replies.

**old Rusty C10** · 02-26-2021, 11:34 AM

every truck ive had except for the diesels had them thats what connects to those inline fuseable links attach to

Tance52 · 02-26-2021, 01:34 PM

Ahh, that would explain it, mine was originally a diesel (now a 454).

So it's not a fusible link, but basically a bus that connects the two studs and interconnects all the cables attached? So I can fabricate any metal plate and drill it to fit the studs, then attach cables to both sides? Somehow that makes me nervous.

**kwmech** · 02-26-2021, 03:01 PM

The metal plate connecting the studs from the factory has a 12g wire attached to it. Quite often I will loop a fusible link wire to connect the 2 studs.

Dead Parrot · 02-26-2021, 04:09 PM

Yes, you can make your own plate.

If your restoration is practical instead of perfectly year correct, you could use one of these off of a 90s era Chevy/GMC pickup. All of the studs are connected via a hidden buss bar. $5-10 with the wires at the Pull-a-part around here. Just put it in the same place the original 2 stud version goes.

**old Rusty C10** · 02-26-2021, 04:35 PM

its a power side so it has to be insulated so the power wires can attach without grounding out... Im sure that Dorman makes something or theres something where they sell marine and suto electrical stuff here's the one on my only gas job left 1979 bare bones truck and i stand corrected the green backround is an 86 military issue CUCV and this is the one on the firewall

02-26-2021, 10:32 AM	#1
Tance52 Registered User Join Date: Jul 2006 Location: Guys Mills, Pa Posts: 20	Firewall Junction Block 1984 K30 I'm restoring a 4x4 K30 and I noticed some pictures show the firewall junction block with a connector between the studs (like in the picture) and some don't. What's up with that? Is it necessary? Thanks for your replies. Attached Images __________________ Tance

02-26-2021, 11:34 AM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: Firewall Junction Block 1984 K30 every truck ive had except for the diesels had them thats what connects to those inline fuseable links attach to __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

02-26-2021, 01:34 PM	#3
Tance52 Registered User Join Date: Jul 2006 Location: Guys Mills, Pa Posts: 20	Re: Firewall Junction Block 1984 K30 Ahh, that would explain it, mine was originally a diesel (now a 454). So it's not a fusible link, but basically a bus that connects the two studs and interconnects all the cables attached? So I can fabricate any metal plate and drill it to fit the studs, then attach cables to both sides? Somehow that makes me nervous. __________________ Tance

02-26-2021, 03:01 PM	#4
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,634	Re: Firewall Junction Block 1984 K30 The metal plate connecting the studs from the factory has a 12g wire attached to it. Quite often I will loop a fusible link wire to connect the 2 studs.

02-26-2021, 04:09 PM	#5
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,611	Re: Firewall Junction Block 1984 K30 Yes, you can make your own plate. If your restoration is practical instead of perfectly year correct, you could use one of these off of a 90s era Chevy/GMC pickup. All of the studs are connected via a hidden buss bar. $5-10 with the wires at the Pull-a-part around here. Just put it in the same place the original 2 stud version goes. Attached Images

02-26-2021, 04:35 PM	#6
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: Firewall Junction Block 1984 K30 its a power side so it has to be insulated so the power wires can attach without grounding out... Im sure that Dorman makes something or theres something where they sell marine and suto electrical stuff here's the one on my only gas job left 1979 bare bones truck and i stand corrected the green backround is an 86 military issue CUCV and this is the one on the firewall Attached Images __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! Last edited by old Rusty C10; 02-26-2021 at 06:50 PM.



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