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  1. legend57

    Rust removal

    I must be the last person who has discovered this, but just in case there is one last soul out there that hasn't, I wanted to pass this along. I had some parts that I was going to media blast, but a few items are assemblies that can't easily be taken apart, like hood latches, parking brake...
  2. legend57

    np203 shifter

    I'm in the process of rebuilding mine. There is a good YouTube video out there. I ended up buying a spare shifter as a reference, just in case. I may make a video or a detailed description of my rebuild. I've studied the mechanism, and it is clever, but faulty in its crudeness. It is...
  3. legend57

    Passing CA Smog help - High HCs

    The fact that you had to open up the carb and make repairs on a "fresh" carb concerns me. I'd definitely reach out to National to get their 2cents. If those basic items were wrong, then I'd question the whole thing. If you wanted to check, you could verify the idle mixture screws. You could...
  4. legend57

    Passing CA Smog help - High HCs

    Man. Sorry to hear that. I was hoping yours performed like mine. As DoubleDingo mentioned, it would be great to get some more specs on what is going on. I'll relist a few: * Vacuum reading: Value and is it stable or bouncing around * Timing: Value (unplugged from port vacuum) * Spark Plug...
  5. legend57

    Passing CA Smog help - High HCs

    Did you get it to pass smog with the new Qjet carb? I got the same one you did from National Carburetor. The truck actually starts and idles better than with the Edelbrock 1400 I originally had on it, and I haven't made any adjustments yet. We'll see once I'm able to drive it, but so far, I'm...
  6. legend57

    Need: 1976 Chevy K20 Emission Label (or pic of yours)

    Here is a diagram from the Factory Shop Manual that I'm following. The diverter valve is connected to a port on the Qjet just behind the choke pull-off valve, and tees into the bottom port on the thermal (spark control) switch on the water neck. Note, there is also a port that goes to the...
  7. legend57

    Need: 1976 Chevy K20 Emission Label (or pic of yours)

    I'm still waiting to get the pictures. I'll ping them again. If I am successful in getting the pictures, I'm hoping to work with the current label supplier to get one made that matches the picture I provide to them. This will likely be a lengthy process, but at least an option to finally get...
  8. legend57

    Need: 1976 Chevy K20 Emission Label (or pic of yours)

    I haven't. I've looked through the forum as well and haven't found one with my combination. I may have found a truck that has this combination and I'm going to see if the owner could get me some pictures of the labels. If successful, I'll pass them along.
  9. legend57

    Engine Stalling - Bad EVAP/Charcoal Canister?

    Good catch on the power piston. Glad to hear it is running better. I'd highly recommend gathering as many parameters on the truck as possible (vacuum, timing, fuel pressure, AFR, etc..), especially when it is running good. That way, if it starts to run poorly, you have a baseline and can tell...
  10. legend57

    Need: 1976 Chevy K20 Emission Label (or pic of yours)

    Thanks for pointing me to that thread. Definitely worthwhile to compile as a library for other members. If I'm able to get a pic of the one I need, I'll be sure to add it.
  11. legend57

    Engine Stalling - Bad EVAP/Charcoal Canister?

    Thanks, Ricko1966. I wasn't sure if the evap canister allowed flow back into the tank. I agree it is a good thing.
  12. legend57

    Need: 1976 Chevy K20 Emission Label (or pic of yours)

    I need an emissions label for a 1976 Chevy K20 with; 400 cu. in. engine California HD Emissions (has AIR, EVAP, PCV. Does not have EGR or CATS) I've searched everywhere, including Classic Industries and LMC, and haven't found the label. If someone has one on their truck, please provide a...
  13. legend57

    Engine Stalling - Bad EVAP/Charcoal Canister?

    @legozombie Have you been able to test out Ricko1966's tests? I'm currently in the process of installing the fuel system on my 1976 K20 and am curious what you find. I spent most of last week trying to understand how the evap system works. I fully agree it sounds like a vent problem. What...
  14. legend57

    Passing CA Smog help - High HCs

    For those switching from Edelbrock to Qjet, here is the parts list I've come up with (so far); Choke: Since the Qjet 4MV carb has a divorced choke (and I don't have the choke) I am going to try one of these out; https://www.carburetor-parts.com/choke-kit-cu1445 Hard Fuel line from pump to...
  15. legend57

    Passing CA Smog help - High HCs

    Yes, that is the kit. Maybe they figured out an offset to apply given the O2 being added from the air pump. I found a couple of threads where someone had trouble with it, so I hesitated to go down that path. Given the O2/fuel ratio is fundamental to how the fuel injection works, I'm just not...
  16. legend57

    Passing CA Smog help - High HCs

    I extensively researched about the smog compliant MSD fuel injection kit. I was very close to ordering one a while back, until I learned that it won't work if the truck has the smog pump that injects air into the manifolds. It messes with the O2 reading. It is too bad that options to actually...
  17. legend57

    Passing CA Smog help - High HCs

    I just ordered one of the National rebuilt 4MV carbs, #ND4528. I'm not familiar with the Qjets, so need to research all the port connections.
  18. legend57

    Passing CA Smog help - High HCs

    I'm monitoring this thread closely as I'm in the same boat. My '76 K20 has the heavy duty emissions (no EGR, no CATS), and I also went with the Edelbrock 1400 carb. I'm still building the truck, so haven't gone for smog check, but I guess I can now see the future (fail). I'm wondering if we'll...
  19. legend57

    Np203 to 700r4 brace

    That's what I did (see attached pic)
  20. legend57

    I’m interested in swapping out the TH350 for a 700R4

    I'm in the process of installing a 700R4 between a 400sbc/NP203 in my 76' K20. I went with Gearstar for the transmission and they built it to handle the torque (Level 3). I'm extremely happy with the kit and quality of the work so far. I haven't driven it yet, so that review will come later...
  21. legend57

    New member from California

    Great looking rig! From a neighbor, just a few hours north.
  22. legend57

    Fixing vapor lock now that I barely made it home, experience with 3 port filters?

    Before you start changing things, you may want to add a fuel pressure gauge near the inlet of the carb to monitor. Check it occasionally during a drive and see if it changes. I had a similar issue, but it ended up being sediment in the tank that would slowly gather on the filter sock in the...
  23. legend57

    Hello Squarebody lovers

    Welcome from CA!
  24. legend57

    350 TBI in California

    I'm in the same boat with smog, but my truck is a '76, first year requiring smog in CA. (I'm in San Jose, CA). I'm using the AFR heads, which are some of the best out there (IMHO), and they have a CARB EO, #D-250-2. https://www.airflowresearch.com/chevy/sbc-eliminator-23-cylinder-head/ Note...
  25. legend57

    New Member and new owner of a 1976 K20

    Hey All, Thought I'd provide an update on the build. I took the rolling chassis with the Cab and Bed over to the body shop earlier this year. He replaced the passenger floor pan, repaired the cab corners, and repaired the rust spots on the Firewall. He then went to install/fit the new doors...

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