Recent Posts

1

General Discussion / Come get them!!

« Last post by frotosride on June 22, 2026, 12:50:12 pm »

I'm trying to find a home for 3 of my trucks, I am not looking to sell any of them simply looking for someone who may want to come get them. If you or anyone on the site you know migh want them I will help load them. They all 3 have clean titles. I haven't looked at them in person since December of 2023 so they are surely just as in need of repair as before.
> 1) 1987 Sierra R10 LWB, no engine or trans, 10 bolt 3:73 with Detroit Trutrac
> 2) 1983 K20 LWB, 350, SM465, NP205 Holley 650(I think Holley)
> 3) 1984 CUCV blazer, 6.2 Detroit, no trans or transfer case
> I do have a few extra NP205's and sm465 but idk if I can freely part with them rn
> If you or anyone you know that won't scrap them is willing to pick them up I'm in St Mary's, Ga
This is a link to photos I have of these 3 trucks.

https://photos.app.goo.gl/ST8zrYkmApGucZ4w9

2

Engine/Drivetrain / TV bracket for Dualjet carbs?

« Last post by Scaryfastatx on June 22, 2026, 12:45:34 pm »

I havent been able to find a straight answer

I have a Dualjet on my 81 305. I am planning on swapping to a 700R4, but looks like all the TV brackets are for a Quadrajet, and the pictures dont really help if they will fit my dualjet, complicating the issue is the vacuum port on the back of my Dualjet for the brake booster.

Thanks

3

Electrical / Re: TH350C orange test connector use?

« Last post by Scaryfastatx on June 22, 2026, 12:42:29 pm »

So I hooked up a light to the orange plug and routed it to my cluster to see when it comes on

looks like sometimes it comes on off idle at low acceleration, probably at like 10mph, I was under the impression that it wont come on until at least 40mph if I remember right?

I am trying to track down that everything is working on the electrical side so whenever I do a 700R4 swap I can take advantage of the TCC

Thanks!

4

Electrical / Re: Dash brake light

« Last post by MY1978 on June 21, 2026, 04:33:11 pm »

Thank you

5

Electrical / Re: Dash brake light

« Last post by bd on June 21, 2026, 04:20:11 pm »

The brake combination valve is a roughly 2.5" x 5" x 1" brass block that has 5 brake lines running to it and a single-pin switch that connects to the tan/wht wire for the brake warning lamp.

6

Electrical / Re: Dash brake light

« Last post by MY1978 on June 21, 2026, 03:48:58 pm »

No, no pattern.  I assume the brake combination valve is under the hood?  I will try that tomorrow.

**I found an explanation as to where it is.  I will try that tomorrow**

7

Electrical / Re: Dash brake light

« Last post by bd on June 21, 2026, 03:08:18 pm »

Is there any pattern as to when the brake warning lamp extinguishes?  Unplug the tan/wht wire from the brake combination valve to see whether the brake warning lamp goes off and remains off.

8

Fuel Systems and Drivability / Re: Gas gauge issues

« Last post by JohnnyPopper on June 21, 2026, 02:41:07 pm »

Well, maybe I've jumped the gun

Still have a question: If the relay has failed, wouldn't it still read one tank?

Let me analyze my own question: If the relay still moves the valve, has it failed? No

Both tank's sending units display accurately when she decides to wake up.

All other gauges work flawlessly.

Okay, flame away or please offer some guidance. TIA

9

Fuel Systems and Drivability / Re: Gas gauge issues

« Last post by JohnnyPopper on June 21, 2026, 01:44:48 pm »

I just saw the post by Ocho.

I think its the relay that ChatGPT said didn't exist....................

Anyone know where it lives? TIA 

10

Fuel Systems and Drivability / Gas gauge issues

« Last post by JohnnyPopper on June 21, 2026, 01:37:20 pm »

'88 R30 Dual tank. Pollak valve.

Gauge will intermittently read the fuel level, and then go dead. While alive, it correctly reads the level of each tank, and switch the valve.

I have determined that the valve works without the gauge being operational. I think that rules out the switch.

I have cleaned the connection at the valve with DeoxIt.

Any thoughts on where the gremlin lives?