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  1. 85 Squarebody76

    Smoke troubleshooting

    If the smoke is pure white after motor running for 10 plus minutes then the trans vac modulator is bad. When the diaphragm goes bad the motor sucks the fluid up and into the motor and burns it .. hence the chalk white smoke. It will smoke as long as the motor is running.. Check the trans fluid...
  2. 85 Squarebody76

    Towing with a 305 V8?

    I have the exact model but with GMC flag on it... 305cuin Th350 3 speed with locking converter
  3. 85 Squarebody76

    Any tricks to thread speedo cable back through grommet in firewall?

    split the grommet and put around the cable and push into the firewall hole
  4. 85 Squarebody76

    Throttle cable way too long

    I had the same problem.. What I did was loop the cable out of the firewall up and over back towards the firewall and complete the loop and come down off the bottom of the loop and go to the carb attachment point
  5. 85 Squarebody76

    Grinding Noise While Braking

    Sounds like the carrier bearing rubber cushion in the drive shaft squeaking
  6. 85 Squarebody76

    1978-86 Rochester Fuel Filter Seal

    I always reused them back in the 60's.. Never had a problem with leaks...
  7. 85 Squarebody76

    Odd cable/control going to foot feed.

    Snow plow control Maby ??
  8. 85 Squarebody76

    Smokes way to much?

    We used to use ford umbrella seals back in my day and they worked great instead of the O-ring factory style. And NO the guides were not ever machined for them either back then...
  9. 85 Squarebody76

    Odometer

    The odometer is driven by the speedometer gear inside the head... so if it don't work I would take it apart and lube the gear inside the speedometer that turns the odometer assy..
  10. 85 Squarebody76

    Fabbing an alt support bracket

    I would thread the back of the mounting boss of the alternator (top pic ) and make a bracket from there to the 12 point bolt in the intake manifold.. clean and sturdy too
  11. 85 Squarebody76

    Where does the engine smoothness come from?

    Not if you know what your doin... proper jets for motor size correct float adj and choke settings and idle adj and correct mixture screw adjustments...
  12. 85 Squarebody76

    What have you done to your square lately??

    I installed a black soft taunna cover on my GMC long bed. Keeps the leaves and krap from the trees out of the bed...
  13. 85 Squarebody76

    Seized engine?

    I would look for a GM long block crate motor If I were you.... never had much faith in Target motors myself.. IMO..
  14. 85 Squarebody76

    Just brought home an 85

    Welcome from Raymore,Mo and another GMC..."chev" owner. We all know GMC's are better.. HAHAHAHA
  15. 85 Squarebody76

    454 spits out carb at 20% or so throttle at low speed

    Intake valve sticking ?
  16. 85 Squarebody76

    Coolant Reservoir Leak '87? - '91

    I repaired mine with JB Weld on and around the tab outside of tank while it was mounted on the fender well. has not leaked since. That way it was stressed (bolted) to fender well.
  17. 85 Squarebody76

    Oil Pan Gasket Change Out... what else?

    Definitely replace the oil pump while you got the pan off...
  18. 85 Squarebody76

    I cant get my new engine to run smooth. Seems untunable.

    Really sounds like a large Vac leak.. How much vac does it have while running? Should have at least 15 inches. I just fought a similar prob with my '85 305 and found the base plate gasket was bad... could not get over 11 to 12.5 inches at idle. replaced the base plate gasket and it jumped to...
  19. 85 Squarebody76

    Starting up after sitting for up to 7 months?

    Or a vac leak or a bad vac modulator
  20. 85 Squarebody76

    Goodwrench crate engine smoking from passenger side exhaust

    Is there not a brown wire next to the power brake booster ?? If so you need to disconnect it to set the base timing.. Not sure what year truck your working on '86 or'87 and up has the wire..
  21. 85 Squarebody76

    Oil leak

    We know !!!!!
  22. 85 Squarebody76

    Dexron II or III?

    They are interchangable... no worries
  23. 85 Squarebody76

    Flywheel destroyed around the mounting bolts

    I have seen that when I worked at a GM dealer on thansmissions in the '60s and '70s and the consensis was weak metal.. factory says that's why the call it a flex plate because it flexes when going from neutral to driv or to reverse. so they said it was metal fatigue. Not real common but still...
  24. 85 Squarebody76

    87 Stock TBI 350 air cleaner lid flip upside down? Does it help? does it hurt? good or bad idea?

    We did it back in the day cause it sounded great.... didn't go any faster but sounded cool !! when you hit the gas hard
  25. 85 Squarebody76

    timing chain replacement selection advice / what if got after opening it up

    I know when I was working on them back then they most always had a aluminum nylon coated upper gear. GM did that to help quiet down the gear noise.. at least that what the factory rep told me. I always replaced them with an all steel upper gear when I did the work

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