1978 Ranchero upgrade issues need some advice.

Discussion in 'General Ranchero Help' started by Clay, Jan 21, 2020.

  1. Clay

    Clay In First Gear

    Having issues, need advice. History. Have this 1978 ranchero it has a factory equipt 351 windsor, recently swapped out the old cast iron 2 barrel intake with a aluminum edlebrock performer, a holly 650 carb, all emissions / smog pump removed, and hooker super competition headers installed have had issues with it overheating so I replaced 180 thermostat with 160. Seems to be going better now. Has horrendous backfire on acceleration, wondering if that could be timing. In hindsight seems like timing should have been checked after 4 barrel swap. What say ye?
  2. 72GTVA

    72GTVA Administrator Staff Member

    Chesapeake, VA
    Yes, suggest a thorough tune-up - check timing, mixture, base idle, fast idle, etc.

    Edited to add, suggest you also check for vacuum leak around the new manifold.
    HuevosRanchero likes this.
  3. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

    Seguin, TX
    How was it running before the work was performed?

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