Recent content by Geoduck

  1. Geoduck

    What Engine Do I Have

    If you pull a valve cover you can find the casting number fairly easy. The reason mention it is 906 vortecs heads flow amazing. With those heads and a mild cam you have some serious torque and HP.
  2. Geoduck

    What Engine Do I Have

    That is a nice engine. What casting number heads are on it?
  3. Geoduck

    1981? 350 in a C20 - Vacuum/sensor questions

    Here is a link to the Jungle Seller vacuum port plug set/kit I use: https://www.amazon.com/dp/B09XN2VSZM/
  4. Geoduck

    1981? 350 in a C20 - Vacuum/sensor questions

    Shane, here is the link to the forums service manuals it should be helpful. https://www.gmsquarebody.com/threads/1973-1991-service-manuals.14499/
  5. Geoduck

    1981? 350 in a C20 - Vacuum/sensor questions

    Rick nailed it. This is more or less how my 1985 305 is plumbed now and it runs well. Important, run a new distributor vacuum advance hose directly to the intake manifold port behind your carburetor. OEM setup ran that hose through an number of sensors and branched out God only knows how many...
  6. Geoduck

    Engine sags

    Nice looking rig! Check if the tanks are properly vented. My 85 dual tank has the vent going to the charcoal canister.
  7. Geoduck

    Valve Spring Retainers for 305

    LOL, True! I had rags covering all the oil return holes in the head so it could have been much worse. I saw it fall off down the drivers side and for the life of me could not find the darn thing. I've ended up buying a rebuilt pair of heads so no need to go on with this topic. New heads are a...
  8. Geoduck

    Valve Spring Retainers for 305

    Thanks Rick, clearly this is the answer. The valve stems are 11/32 as they should be so it has to be a valve retainer/lock mismatch. I just assumed they were all universal. Will report back!
  9. Geoduck

    Valve Spring Retainers for 305

    Rick, they are the two part cone lock/keeper that attach to the valve ends holding valve spring retainers. I'm replacing the valve seals. On the very first valve I lost the keeper! LOL typical. :disgust:
  10. Geoduck

    Valve Spring Retainers for 305

    I'm having a heck of a time finding the correct size 305 valve spring retainer sets. I ordered from Summit and the Jungle Place but the retainers were too large. In both cases I was very specific 1985 C10 305. My Go-To O'Reilly's can't get them. NAPA guy did not know what they were! Am I missing...
  11. Geoduck

    tighter steering

    Borgeson as Gilmore suggested. I'm likely to get a Borgeson or Red Head. Red Head is about a ten minute drive from us. Listening to; Give Me 40 Acres as I type this.
  12. Geoduck

    Vacuum lines where do they go

    Jimmy, if you can give us the quadrajet series number that would be helpful too. It should be 1705XXXX, the X's specific type.
  13. Geoduck

    Vacuum lines where do they go

    Your choke pull off hose should go to a carburetor port very nearby on the rear. Your choke is hard to view in those pictures. I installed a new electronic choke kit that is simple to install. You need 12 volts switched. This can be had from your wiper motor.
  14. Geoduck

    Vacuum lines where do they go

    I'm confused. You say the truck runs fine except for cold starts? Changing carburetors would do what exactly? Quadrajets do have many vacuum ports but they are fairly easy to sort out. Others here have explained the three vacuum lines that most concern you. 1) Vacuum advance goes to its...
  15. Geoduck

    I finally gave up.

    I recently got a dash pad cover from Ebay that looks very good. Have not installed it yet. Fair about of work removing the old pad and installing the new one but is doable. https://www.ebay.com/itm/184510416999
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