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    Quadrajet Primary Shaft Bushings

    I've rebuilt several quadrajets and I just use lacquer thinner it dissolves everything and it comes off clean!
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    454 year

    My 1980 GMC came with the 400 from the factory my brother installed the 454 out of one of his other trucks but I don't remember what year, how do I identify the year of this 454? Or how do I identify anything on this 454?
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    Big block running hot. Can’t figure out the issue

    Checking that the carburetor providing the correct amount of fuel so you're not running lean would be the next step I would do knowing what I know, because your problems and all the cures you've tried to fix your problems is exactly what I went through 15 years ago! I did everything under the...
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    Dual tank switches and valves

    I failed to mention this is in my 1980 GMC 1 ton dually
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    Dual tank switches and valves

    I am trying to get my fuel tank situated, I have dual tanks one was already replaced but I'm looking at this valve two-way valve, does anybody have a diagram of this valve and where the lines go? It's the valve that switches from one tank to the other
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    Big block running hot. Can’t figure out the issue

    Proper AFR is 14 to 1
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    Big block running hot. Can’t figure out the issue

    Leave most carburetors are efficient at 14 to 1.?
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    Big block running hot. Can’t figure out the issue

    Here is something to consider, years ago I had a Pontiac 455 that I rebuilt from the ground up, everything was brand new, bought remanufactured quadrajet 4 barrel, engine had lots of power but I felt it could have a little more, sitting they're at idle the engine temperature would slowly creep...
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    Two piece drive shaft bolts

    1980 GMC k 3500, Does anyone know what size bolts hold this two-piece driveshaft flange onto the output of the transfer case? It's the output that connects the drive shaft to the front differential
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    Two piece front drive shaft

    The drive shaft that came with my truck is about 3 in Long then it should be, it came with the automatic transmission from the factory, my brother put a standard transmission in and now the front two piece is too long, I've been looking for a replacement but I can't find one the exact length of...
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    17-in rims

    I spoke with a guy at Motorsport tech and he hears of these issues all the time, he's very familiar with the rim hub diameters of a lot of vehicles and he makes lots of adapter rings for these older square bodies being converted to larger hub rims, I've decided to have some custom-made that will...
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    17-in rims

    On a side note they fit snug inside the rim, the outside diameter 121.3, mm but they fit a little loose on the hub, 116.7 mm inside diameter. When I measure the hub diameter of the original rims it measures out 115.7 mm, maybe this small difference won't matter?
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    17-in rims

    This is the exact measurements of the rings that I bought that allow these wheels to fit my 1980 GMC
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    17-in rims

    I bought those rings off of Amazon, they have many different sizes made out of different materials.
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    17-in rims

    Update, I bought a set of hubcentric rings for my 1980 GMC dually to mount 17 inch wheels from a 2010 Ram 3500, so far so good
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    Dual fuel tanks and valves

    Here is a photograph of the switch
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    Dual fuel tanks and valves

    The wires that come off my switch are pink pink with the white stripe light blue and green, there's a black wire hanging there but I don't know if it goes with it
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    Dual fuel tanks and valves

    Thank you I will use these diagrams and see what I can find, my question too is where is this selector valve that switches the fuel from one tank to the other?
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    Dual fuel tanks and valves

    I forgot to mention the gas gauge stays in the full no matter where I position this switch
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    Dual fuel tanks and valves

    My 1980 GMC 1 ton dually has dual fuel tanks on looking at the switch does anyone know which color wires or number goes to the left tank or the right tank? I'm trying to find information on how to troubleshoot the passenger side fuel tank has been replaced the driver's side has not been replaced...
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    Receiver hitches

    Maybe this design?
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    Receiver hitches

    My 1980 GMC dually currently does not have a receiver hitch, there are several good used ones on Facebook market but I don't know what years will interchange with my truck, this may be a broad question but how do I find out what years 2 in receiver hitch will fit my 1980 GMC 1-ton dually?
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    Gear swap

    Someone wants to give me a set of 3.73 ring and pinion out of a 2002 GMC Sierra 2500 HD, would they possibly fit in my 1980 GMC 1 ton dually with a Dana 70 rear end? What other information would be needed?
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    Rear end

    Ok, thank you!
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    Rear end

    Now that I remember, you are correct in the transfer case adapter I'm pretty certain, when we put this standard transmission in we put the transfer case that was married up to in in the other truck but it came out of with it,

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