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Firewall Clearance

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 70jimmy, Oct 10, 2000.

  1. 70jimmy

    70jimmy 3/4 ton status Premium Member GMOTM Winner

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    I just installed HEI and Accel supercoil and have zero firewall clearance. Has anyone ever cut the firewall and boxed it in for more clearance. If so What type of material did you use? What did you use to cut the firewall? Did you cut it from engine compartment or under dash. I was thinking of making a box out of aluminum or steel and popriveting to firewall???
     
  2. scavenger

    scavenger 1/2 ton status

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    I really think it would be a lot easier to remove the distributor and whack the heck out out the firewall with a large hammer. I know this sounds kind of crude but it works, and can save a lot of time. Whatever way you decide to do it remember that you will have side to side movement also, so you want to be sure there is nothing in the way to obstruct the sideway movement of the distributor. Just a guess, but 3 inches to each side of the distributor, and a 1 inch space between the top of the distributor cap and the firewall should do the trick.
     
  3. sosamantx

    sosamantx 1/2 ton status

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    <font color=blue>I agree with Scavenger, just get a big hammer or sledgehammer and whack away. Older muscle cars have this problem as well. I haven't really heard of anyone cutting the firewall just to clear the distributor for a conversion. I only had about 1/4 inch clearance on my Nova, but you could tell it was rubbing when the motor was torqueing over. Anyway, good luck. - Steve</font color=blue>

    <font color=blue>Steve Sosa a.k.a. "sosaman"</font color=blue>
    http://sosaman.home.texas.net/carpics.html
     
  4. Burt4x4

    Burt4x4 3/4 ton status

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    Duno if this is an option for you but a 2" body lift would do it for you!!???
    Or
    Ditch the HEI stuff and get an MSD 8360, it is the sam physical size as our old points dist. I have one and it is AWSOME!!

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    http://www.burt4x4.coloradok5.com
     
  5. Emmettology 101

    Emmettology 101 3/4 ton status

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    Do you have the plastic on the firewall? My 82 has plastic covering the entire firewall, maybe because it was a diesel. All i did was cut a chunk out of that and I had no problems.

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; http://emmett.coloradok5.com
     
  6. BigBurban

    BigBurban 1/2 ton status

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    Just "form" it with a hammer and paint over it. My '82 (which was also a diesel) had a clearance problem when I lowered the T-case. Upon closer inspection, my T-case/tranny mounts were worn and once replaced the clearance wasn't an issue... You might want to check into this first.

    <font color=red>~BigBurban</font color=red>
    http://www.geocities.com/crash607
     

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