Tune-Up - V8: Carburetion: Notes

1968 Chevrolet Biscayne 7.0L Eng, Automatic Trans, Trans Mfr CD PowerglideSECTION Notes
  Rochester Model & No.
Engine & Model Synchro-mesh Auto. Trans.
307" 2GV 7028101 2GV 7028110
  With Air Cond. 2GV 7028103 2GV 7028112
327" 210 HP 2GV 7028101 2GV 7028110
      With Air Cond. 2GV 7028103 2GV 7028112
    250, 275 HP 4MV 7028213 4MV 7028212
    300 HP 4MV 7028207 4MV 7028208
    325 HP 4MV 7028229  
    350 HP 4MV 7028219  
350" 4MV 7028213 4MV 7028212
396" 325 HP Camaro 4MV 7028217 4MV 7028218
        Except Camaro 4MV 7028211 4MV 7028210
    350 HP 4MV 7028217 4MV 7028218
427" 385 HP 4MV 7028211 4MV 7028210
    390 HP, 4MV 7028209 4MV 7028216
  (1) Holley Model 2300
Engine Synchro-mesh Auto. Trans.
427" 400 HP Primary R 4055A R 3659A
    Secondary B 4056A R 4056A
  435 HP Primary R 4055A  
    Secondary R 4056A  
(1) Three 2-barrel carburetors; one primary and two secondary.
  Holley Model 4150
Engine Synchro-mesh Auto. Trans.
302" R 4053A  
396" 375 HP R 4053A  
  427" 425 HP R 4053A  
  430 HP R 4054A  
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.