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#1 |
Registered User
Join Date: Jun 2009
Location: Conroe, TX
Posts: 86
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First square. 1980 GMC
Hey guys, I finally got this project home this Saturday. Bought it a week ago, but couldn't get it back here. I'll include pics at the end of the text
I have a bunch of questions because i picked this thing up really cheap and know it needs alot of work. I have no mechanical experience or fabricating. I've wanted a 73-87 since I was 15 so I went for it. I know I'm jumping in way over my head but I want to learn every single thing I can.. So it's pretty rough, bed is rusted through and damaged on the side. I suppose I can try to find another bed to put on it. I haven't got to get completely through the cab yet to see what the deal is there. The hood is obviously bent, but closes somewhat. I'll find another for it if I can. There is some weird wiring done I think, and i'll have to try to sort that out. My biggest questions is where do i start?? It doesn't run.. supposedly needs new head gaskets. I don't think the carb was functioning right, so I just pulled it off tonight, with tons of pics of everything how it goes. Going to try to find out a model on it for maybe a rebuild if possible... all I can see on it now is Rochester Quadrajet.. So ill clean a bit and see if there is anything else written on it. Hmm there is the numbers 17080206 on it, a quick google search brought me to some pics and rebuild kits. Well here are the pics, just an Imgur album. I can upload them right onto this post if y'all would prefer. http://imgur.com/a/f7hBv |
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#2 |
Registered User
Join Date: Mar 2013
Location: Fayetteville Arkansas
Posts: 830
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Re: First square. 1980 GMC
First order of business is to buy a repair manual... and get to know your local pick n pull, and craigslist...
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Scott 87 Chevy 2WD SWB, 88 4x4 LWB http://67-72chevytrucks.com/vboard/s...d.php?t=610652 |
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#3 |
Registered User
Join Date: Jun 2009
Location: Conroe, TX
Posts: 86
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Re: First square. 1980 GMC
Yeah i didn't even think about that even though I just got one for my dodge. From the vin, I'm pretty sure it came with a 305 and it has an older gm 350 in it right now.. or according to the valve covers and what the guy said haha.
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#4 | |
Registered User
Join Date: Mar 2014
Location: Clearfield Utah
Posts: 638
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Re: First square. 1980 GMC
Quote:
Does the VIN start CCL (350) or CCR (400)? I don't see an option for a 305 on my VIN spec sheet.
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My build thread. 1977 C10 short box. >>>> http://67-72chevytrucks.com/vboard/s...d.php?t=624182 700R4 build thread. >>> http://67-72chevytrucks.com/vboard/s...36#post6740236 |
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#5 |
Registered User
Join Date: Jul 2011
Location: WV
Posts: 946
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Re: First square. 1980 GMC
Check the block numbers, directly in front of ta passenger side head stamped on the block surface. That will tell you what it is Other than the hood, the body looks nice. One of the first things I would do that I noticed that needs to be undone is the fuel line. Truck came from the factory with steel line the whole way from pump to carb. I would put it back that way. As far as the head gaskets, check your compression before you do anything. Not terribly difficult.
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72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold ![]() 70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD |
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#6 | ||
Registered User
Join Date: Jun 2009
Location: Conroe, TX
Posts: 86
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Re: First square. 1980 GMC
Quote:
Thanks! I've browsed these forums for years and saw N2TRUX's truck a few months back at a show 5 miles from my house. He's helped me out alot with looking back when i was 15 and now again at 20. My VIN starts w/ TCG I'm pretty sure(don't have it on me right now) and the decoder i looked at said T = GMC C = conventional cab and G = 5.0L 2bbl.. however I think it has a 350 in it? I haven't looked up how to really tell, it says 350 on the valve covers and thats what he said was in it. Quote:
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#7 |
Don't Crush em Restore em
Join Date: Aug 2004
Location: Pinehurst, Texas
Posts: 764
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Re: First square. 1980 GMC
Welcome to the forums, from a fellow Texas guy, that does not live to far from you. The truck is a little rough around the edges, but that is how mine started to, to there is lots of hope for the old girl. Looks to me that the person before you bought a GM Target Master engine and did a swap, I would bet money that is not the original engine.
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TexasJeff 2009 Silver with Linen Interior Cadillac DTS 1990 Red with White Top and Interior Ford Mustang GT convertible 1998 Red with Gray Interior, C3500 Chevy Crew Cab Dually ![]() ![]() ![]() ![]() ![]() ![]() |
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#8 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: First square. 1980 GMC
nice score,looks solid
I'd lube up the hood,that can happen when the hinges seize up,
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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#9 | |
Registered User
Join Date: Jun 2009
Location: Conroe, TX
Posts: 86
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Re: First square. 1980 GMC
Quote:
Also to anyone reading this, when you try to start the truck, you have to have it in reverse... how can I fix this? I have the carb off and whatnot right now but I'd like to know why I have to go from park to reverse to get it to even attempt to start and maybe fix it before putting the carb back on after cleaning/rebuilding(if I can haha). |
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#10 |
Registered User
Join Date: Jul 2011
Location: WV
Posts: 946
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Re: First square. 1980 GMC
Here's the lines I'm talking about. As far as starting in reverse, your neutral safety switch needs adjusted. Its on the lower end of the column, on top.
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72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold ![]() 70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD |
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#11 | |
Registered User
Join Date: Jun 2009
Location: Conroe, TX
Posts: 86
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Re: First square. 1980 GMC
Quote:
There are also random wires in the interior that I am not sure about. I took the seat and carpet out today, not so pretty.. but I think it's not all horrible(if we forget about the floorboards) Last edited by Mayhem.Evol; 04-21-2014 at 09:40 PM. Reason: Spelling and Pics |
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#12 |
Registered User
Join Date: Jun 2009
Location: Conroe, TX
Posts: 86
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Re: First square. 1980 GMC
I pulled off the dash pad thingy today and it was filthy underneath it. I also pulled the paneling under the steering wheel to look at the wiring.. I have no clue what any of it is lol. Any ideas?
Sorry for bad pictures, they didn't look that blurry on my phone. The first pic is the radio. I'd like to remove it, but I'm not sure how to go about doing that. Can i just remove all wires completely that are connected to it? without messing anything else up. The 2nd pic is a clump of wires hanging down. I don't know how to deal with these.. the orange and blue ones were running to the back of the seat for speakers/subs I think. Any suggestions? or can someone point me in the right way to getting that mess cleaned up. Also, is there a way to check if gauges work w/o the truck being on? probably a stupid question And one last thing this post.. Any suggestions on a good way to clean up the metal of the floor in the cab? its just dirty and greasy and has rat crap on it. Not sure on the best way to get that up. |
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#13 |
Registered User
Join Date: Jul 2011
Location: WV
Posts: 946
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Re: First square. 1980 GMC
Looks like the radio is held in by the two nuts on the tuner shafts and there looks like there is a silver metal strap from the back of the radio to the lower dash. There should be a plug on the back of the radio. That should get your radio out. As far as the floor, I would wire brush and then use some POR 15 paint on it.
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72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold ![]() 70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD |
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#14 |
Registered User
Join Date: Mar 2014
Location: Mount Vernon, WA
Posts: 417
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Re: First square. 1980 GMC
If you have any rust that you need to deal with. I highly recommend that you do what I did for my floor. Put a wire brush head on a drill and clean up the floor. Then vacuum the debris out. For the rust, I used a product called Conquest. Not sure where you'd find it around there, because I bought mine from a boatyard. Conquest is really expensive, but you shouldn't need much. Pour it into a pint bucket, yogurt container, etc. Mix it up and apply with a paintbrush to the rust. When it's converting the rust, it should turn the rust black. Allow at least a day for it to dry. Then you can prepare to paint the floor.
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Cameron 1984 Chevy C20 Custom Deluxe |
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#15 |
Registered User
Join Date: Mar 2014
Location: Mount Vernon, WA
Posts: 417
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Re: First square. 1980 GMC
Btw, I'm glad to see there's another young guy on here. I'm 21, and figuring my '84 out as I go as well.
Actually, from what I can tell, your floorboards don't look bad at all. Mine were rustier than that. And I have a golf ball sized rust hole just inside the driver's door on the vertical part of the hump the seat mounts to.
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Cameron 1984 Chevy C20 Custom Deluxe |
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#16 | |
Registered User
Join Date: Jun 2009
Location: Conroe, TX
Posts: 86
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Re: First square. 1980 GMC
Quote:
I'm going to try to get it running and whatnot first, I'm just ripping the interior out right now because teardown/cleaning is somewhat free haha. I'm having to do it pretty slow for now because I spent a few grand on my 2010 dodge. I think the wiring will be my biggest issue. There also seems to be trash all in the vent system which I'll try to clean out tomorrow, and maybe get some cleaning equipment.. brushes and whatnot later this week along w/ carb cleaner and rebuild kit. I'll have plenty more questions for everyone by the end of the week. |
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#17 |
Registered User
Join Date: Mar 2014
Location: Mount Vernon, WA
Posts: 417
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Re: First square. 1980 GMC
If you need seatbelts, I have the shoulder belts with the plastic retractor covers. There are in excellent condition, just need to be riveted back together. And the driver's side warning buzzer works if that matters to you.
I also have an AM radio that works pretty well. Anything else I can do to help, let me know.
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Cameron 1984 Chevy C20 Custom Deluxe |
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#18 | |
Registered User
Join Date: Jun 2009
Location: Conroe, TX
Posts: 86
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Re: First square. 1980 GMC
Quote:
Watching videos on headgasket replacements right now just to see what I'm in for. |
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#19 | |
Registered User
Join Date: Mar 2014
Location: Mount Vernon, WA
Posts: 417
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Re: First square. 1980 GMC
Quote:
Spray it with lots of penetrating oil. Tighten it back up, then out again. That way you can work it out without damaging the threads.
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Cameron 1984 Chevy C20 Custom Deluxe |
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#20 | |
Registered User
Join Date: Jun 2009
Location: Conroe, TX
Posts: 86
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Re: First square. 1980 GMC
Quote:
Happen to have any suggestions as to where I should get a rebuild kit for the quadrajet I took off of it? I've looked up a few threads on here, just wondering if you had any experience w/ them. |
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#21 |
Registered User
Join Date: Mar 2014
Location: Mount Vernon, WA
Posts: 417
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Re: First square. 1980 GMC
I have yet to rebuild my Q-jet, but when my dad rebuilt the carb on our International Scout, he went to Mike's Carburetor Parts for the rebuild kit.
He's located between Seattle and Portland. His kits aren't the cheapest, but the service is unbeatable, and there are videos and demos on the website. If all you care about is price, NAPA should have the kit you need. First, I suggest you get the numbers off your carb, and look them up on Mike's to identify the kit you need. Here's the website: http://www.carburetor-parts.com/
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Cameron 1984 Chevy C20 Custom Deluxe |
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#22 |
Registered User
Join Date: Mar 2014
Location: Mount Vernon, WA
Posts: 417
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Re: First square. 1980 GMC
Do you have the number on your carb handy?
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Cameron 1984 Chevy C20 Custom Deluxe |
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#23 |
Registered User
Join Date: Mar 2014
Location: Mount Vernon, WA
Posts: 417
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Re: First square. 1980 GMC
Never mind, I saw the numbers on your first post. I'm not 100% (hopefully someone can confirm this), but I believe this is the kit you need:
http://www.carburetor-parts.com/Roch...Kit_p_742.html
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Cameron 1984 Chevy C20 Custom Deluxe |
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#24 |
Registered User
Join Date: Mar 2013
Location: Fayetteville Arkansas
Posts: 830
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Re: First square. 1980 GMC
[QUOTE=Mayhem.Evol;6641627]
The 2nd pic is a clump of wires hanging down. I don't know how to deal with these.. the orange and blue ones were running to the back of the seat for speakers/subs I think. Those all look like speaker/stereo wires. I would take the stereo out, it should have a plug behind it with the wires...
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Scott 87 Chevy 2WD SWB, 88 4x4 LWB http://67-72chevytrucks.com/vboard/s...d.php?t=610652 |
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#25 | |
Registered User
Join Date: Jun 2009
Location: Conroe, TX
Posts: 86
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Re: First square. 1980 GMC
Quote:
When I wire brush the floor, should I use some sort of chemical with it to help or just straight brush to metal? ah I'll see what I can do about it then. I wasn't sure if they'd run right to the radio or what and didn't wanna start pulling haha |
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