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  1. longbeach

    Alternator amps

    Is there a way to tell what alternator came on the truck originally. It's an 86 K20 Silverado with A/C. Nothing else unusual. I've put a couple of Generic brand 78 amp alternators in and they drop off voltage when running lights, Heater on #3, wipers. I've replaced the blower motor, resistor and...
  2. longbeach

    Seat belt retractor

    The seat belts on my 86 K20 don't grab if yanked out. On my other cars a quick yank on the belt and it grabs. They retract fine. I lifted the plastic cover up some and I see a little weight with spring set up that if moved grabs the belt. Is there something I'm missing here. I lubed everything...
  3. longbeach

    voltmeter to zero.

    Twice in the last couple of rainy days, my voltmeter has dropped to zero momentarily. first time I had just witched on headlights. Turned them off and volts came back. Today, I turned off lights, no difference but after a few more seconds volts came back. Lights on again. Is this something that...
  4. longbeach

    Tail light lenses

    Anybody have any experience finding aftermarket tail light lenses that fit correctly? I tried two different makes and they did not fit correctly. Gap around outside edge was too large. And the chrome trim would not stay on.. Thanks
  5. longbeach

    Sliding rear window gasket?

    Hi, I'm looking at buying a used sliding rear window for my 86 K20. I've found a few, but when searching for a new gasket all I find say not compatible with OEM sliding rear window. Any ideas or info on this appreciated. Will the gasket from my old solid window work? Also, just realized I posted...
  6. longbeach

    86 K20 front wheel bearing question

    I'm looking to order front axle wheel bearings for my 86 K20. Looking on Rockauto I see listings for 2nd design axle.??? It's a corporate 10 bolt front axle. The only numbers I see are on the rear lower web. #4030(9?)70. Any ideas on 2nd design axle?? Thanks to Bextreme04 for pointing my error...
  7. longbeach

    Am I crazy to expect more than 10 MPG

    I have a 1986 K20 with a crate engine with fewer than 5k miles. 350/TH400, 4:10 gears, Edelbrock 1406 carburetor. Truck runs fine, Starts fine. Stops fine. Carb is not that old and I tried a brand new one. All I get is 10 MPG, no matter what. New plugs, new wires. Timing is about 10 degrees...
  8. longbeach

    inline six compatability

    I have a 350 in my 86 chevy K20 and I want to swap to an inline six. I see a lot of 60's and 70's sixes for sale. Not so many 80's. How far back can I go and still have the inline six mate up with a TH400 transmission?
  9. longbeach

    TH400 dipstick

    Proper length of dipstick for a 1986 TH400. Or, alternately depth of oil above bottom of pan or whatever the stick bottoms out on ?
  10. longbeach

    350 to 250 swap

    I have an 86 silverado K20 with 350, TH400. I'd like to do a swap for an inline 6. Will motor mounts and bell housings all line up. Are there certain years that will work and others that won't. Thanks
  11. longbeach

    Fuel tank vacuum

    Hi, I recently acquired an 86 Chevy K20. It had a crate engine installed by prior owner. Most emissions equipment is gone. Running fine, ( although I thought MPG would be a little better ) but when I open gas cap there is a big whoosh of vacuum. Is this right? Do I need a new gas cap?

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