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HEI and Exhaust

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by K5_73, Feb 11, 2001.

  1. K5_73

    K5_73 Registered Member

    Joined:
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    Location:
    Wichita, Kansas
    Just wondering what is needed to convert to HEI (wiring too) and what the best headers and mufflers are for the price, and what the best tubing size (2.5" or 3") would be for a 383 stroker. I was kind of mad to find that they don't make Afterburners to fit the stick models. I know there will be many different opinions, but that's ok.

    Stupid hurts
     
  2. scavenger

    scavenger 1/2 ton status

    Joined:
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    Location:
    Southern Wisconsin
    Can't help on the exhaust questions but here is a little info on the HEI distributor. You will need to get a used or rebuilt HEI dist for a Chev V-8 (preferably one from 78-81 for a 350 is what I have been told). Replace the module and stator unless you know they are in good condition. Use your old vacuum advance module if it is working properly, or get a new one with the same advance as the old one. Remove the old external coil, then cap off the wires from the old coil (this is what I do, but others have used these, or one of these wires to power the HEI dist). Remove the old dist and install the new HEI unit. I then run a 10 ga red wire from the BAT terminal on the dist cap housing to the fuse block terminal that says ignition. For the end that you connect to the BAT terminal you can use a female wire connector, but it is probably best to get a donor connector from a junked veh, or get a new connector from a dealer or parts store. This connector will keep the wire on the BAT terminal helping to avoid sudden death from lack of juice. By using this original terminal end you will have to splice it on to the new 10 ga wire. Now you should be all set. I noticed in your post you mention 383 stroker. I assume this information will work for this engine, but maybe others that have this engine will be able to offer any do's or don'ts that pertaine to this particular motor......good luck
     

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