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chevy 454 help!!

Discussion in 'The Garage' started by chevy_454, Jul 14, 2005.

  1. chevy_454

    chevy_454 Newbie

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    hey guys,
    i have a chevy 87 original 305 tbi,
    swaped in a 454 with carburation.
    now what would i need to finish the job since i went from injection to carb...???
    i know my feul tank has to be changed and fuel lines too.
    but all i have is the motor which is in the truck now. but not hooked up.
    should i keep the tbi injection and just modify the intake to tbi?
    or should i buy a sprk module and hook up the carb the good old way??
    what i really need is help to hook up the motor since im a jeep guy and im working with very little parts here. i have to shop around for what i need and guess it as i go along.
    any help would be great thanks
    junior
     
  2. Mad-Dog

    Mad-Dog 1/2 ton status

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    You don't need to pull the tank....a mechanical fuel pump will pull fuel clean through a rotary vane injection pump w/o a problem, you could utilize a bypass regulator for carbureted engines and use the fuel injected return line to constantly recirculate un-used fuel back to the tank.

    Carb or Injection.....Injection or Carb...... :thinking:

    The choice is yours my friend, Carb is user-friendly, easy to fix, makes big power, is cost efficient but not emissions friendly unless you do your homework.
    Fuel injection is complicated, PITA to diagnose, expensive but fuel efficient and emissions friendly unless a sensor fails.
     
  3. chevy_454

    chevy_454 Newbie

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    454

    where i live i have no emmissions laws, my jeep right now has no emmissions at all!! lol
    but what i need to know is since i can keep my tank,...
    what do i need to hook up the motor,,,??
    all i have is .
    distributor,
    starter
    alternator.
    intake with carb, quadrajet
    complete motor, but lines and spark module i dont have,
    since the truck was a tbi injection, now i have all these wires here.
    im sure i dont need all those wires for carb.
    anyone ever do the swap before??
    tbi to carb in a full size?
     
  4. ratzila

    ratzila 1/2 ton status

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    I had it done on my 91 blazer and then to my 90 burb. We used the stock tank & fuel pump but you have to add in a fuel pressure regulator. It is easier just to run a stock hei distributor rather than going aftermarket. You might also need to check to see if the power steering pump will work. I had to get the older style pump because of the fittings would not work and the bracket is different. Good luck with the swap you will enjoy the extra power :saweet:
     
  5. chevy_454

    chevy_454 Newbie

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    thanks guys, but what i need to know is , basically...
    once the carb motor is in.....
    what would i have to do to hook the ignition, how?
    the truck is a tbi .???
     
  6. ratzila

    ratzila 1/2 ton status

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    Use a stock hei distributor and you only will have to hook up the hot ignition wire. I had the msd stuff and went back to hei when the msd offroad ignition burned up.
     
  7. Mad-Dog

    Mad-Dog 1/2 ton status

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    The HEI distributor requires a switched 12V power source, that's it......
     
  8. sweetk30

    sweetk30 professional hooker Premium Member

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    dont forget 12 volts key on and in crank position.:wink1:
     
  9. Mad-Dog

    Mad-Dog 1/2 ton status

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    True that....... :bow:
     

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