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new 20 gallon tank

March 11, 2025, 05:59:31 pm by Rough75C20
Views: 2752 | Comments: 4

Hello All,

Looking to upgrade my C20 Fuel system. I currently have a 14-gallon tank on the passenger side that is being used as the main tank. However, the sending unit isn't hooked up to the gauge so I'm guessing on gas level right now. I am looking at getting a new 20-gallon tank from Jegs. Question is about the fuel sending unit. the truck currently has a 305 with a 4-barrel Quadrajet. I'm looking at the fuel sending units and I believe I need the one with two outlets (supply and vent). I haven't seen a return line to the current tank. Is this normal for these old carb setups? I have attached what is currently in my shopping cart from Jegs. Let me know your thoughts. I'm planning on using a T with a ball valve to control which tank is being used, but the sending unit will be hooked up to the main tank.

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Power window and lock conversion with harness connections inside cab

March 05, 2025, 09:49:09 am by Lowellguy1 | Views: 3739 | Comments: 1

Hello, I am restoring an 1987 Chevy R10. I am converting it to power windows and locks from donor doors. I have acquired an original door harness for each side. When I ran the harness through A Plr. and into the cab on the passengers side there was an existing 6 plug female block/connector above the glovebox that looked to be correct for the passengers side harness. Is this possible it is pre wired for these options? On the drivers side I could not find the same plug. (I have yet to verify the plug and power on the passengers side). I did remove a doner harness a while back but my issue is that the plugs on each end of the donor (cab) harness are not correct. Any help with locating the schematics as to how each side ties into the dash harness would be greatly appreciated.

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76 k20 overlanding rig

February 26, 2025, 06:39:43 pm by 1989bmw535i | Views: 3458 | Comments: 3

I'm attempting to do something not a lot of people have done in one of these trucks, I plan to drive the pan-american highway. I'll start in Prudhoe bay Alaska and end in Argentina, although I'll probably see how far I can make it south in Chile, I'm not following the highway, I'm gonna float around where ever I feel and in south America and Mexico I'll probably zig zag from coast to coast. I have a 76 chevy k20, it currently has a 350/th400 with a 10 bolt front end, 14 bolt rear and an np208 transfer case. I plan to swap it for a lightly modified 24v common rail cummins, I'll keep the axles, and find a manual transmission and transfer case (probably an np205) to fit the cummins, I'm only choosing the cummins for reliability, I need it to be capable of running high sulfer fuel and I'm going to "bulletproof" it. I'm going to take the bed off and build a camper on the back, I'm looking at 35in tires and a 4in lift. For those who are unfamiliar, some of the roads in south America are straight up offroad trails and I need the vehicle to be capable but also dependable, I'll probably be gone for 1.5-2 years. I'm looking for any advice people have to get the truck to a point I don't have to worry about it, what suspension can I get that will flex some but still be able to handle the weight of the camper? Any advice is appreciated. Thanks!

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73-87Chevytrucks.com Hosting update

February 17, 2025, 05:18:33 pm by Captkaos
Views: 10133 | Comments: 17

In the next few days we will be migrating all pages from 73-87chevytrucks.com to a new Hosting platform with new servers and hardware. Prior to this happening the forum will be put in maintenance mode were we can freeze it for the migration and not loose any post. Please bear with us while this work is done as it may be an hour or more for the update to be completed.

If you have any questions please email us at webmaster@73-87chevytrucks.com

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Electric Fan Conversion - Where Does the Fan Switch Go????

February 12, 2025, 12:19:51 am by Dr_Snooz | Views: 15560 | Comments: 3

It was a night of miracles here. I'm trying to get this Griffin radiator installed in my truck. They sent this fan switch along with it.

The obvious question is what's the best, easiest place to put it? I asked AI, but it doesn't know anything, so I'm posting this up for posterity.

On my truck, with a 350 small block and stock heads, there is this plug in the passenger side head, between the #6 and #8 spark plugs.

It's the obvious place to put a fan switch, but it's not that easy. The plug won't accept anything in your tool box. It's square.

5/16" square to be exact. So no, your socket extensions won't work. You'll have to run to Big Orange and scare up a length of 5/16" square bar, which is hard to find. You can grind down a 3/8" extension until it fits, but that's tedious and the heat will probably anneal your extension so it fails. Keep a tub of water nearby to quench it as you grind. By some miracle (like I said, it was a night of miracles), I had a scrap of 5/16 square bar in my deceased father's tool chest. It's been there unused for maybe 30 years until tonight.

I thought the new switch would thread in easily, but again, no. It's too small. I figured I'd have to buy a brass adapter from Summit and wait another week to get it. Except I couldn't find an adapter. Nor could I find the thread sizes I'd need. In desperation, I went to my scrap plumbing box and grabbed random bits to compare the threads against. Turns out I already had what I needed (miracle #2). The threads on the switch are 1/4" NPT. The threads in the block are 3/8" NPT. I had a galvanized bushing adapter that worked perfectly.

Here's everything you need. Even thread sealant.