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2000s hydroboost into a square

Discussion in 'Suspension, Steering & Brakes' started by RoryH19, Feb 25, 2020.

  1. RoryH19

    RoryH19 Full Access Member

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    350 TBI, LS Swap 6.0, 350 carb
    Has anyone installed a hydroboost from a 2003, 4, 5... suburban, Tahoe, escalade... into a square?

    If so, assuming I would have to use the pedal, hydroboost unit and master cylinder.
    Power steeping pump would also need the extra connector.

    Thanks.
     
    MrMarty51 likes this.
  2. climb-101

    climb-101 Full Access Member

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    i put the one from the 2006 truck in mine. i used the stock brake pedal and just matched the connection point from where it pivots down to the rod. I also had to cut the rod coming out of the master and thread it so i could attach the original push rod.

    as far as the engine side, i mad a new bracket for the master so i could use the original studs on the firewall and i had to enlarge the original hole a little where the rod goes through the firewall
     
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  3. RoryH19

    RoryH19 Full Access Member

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    350 TBI, LS Swap 6.0, 350 carb
    Thanks.
    I thought it was possible but knew it would take some work.
     
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  4. TPISly-C10

    TPISly-C10 Full Access Member

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    i'm OEM HB and this is the best brake set up you can have! maybe gonna upgrade it whit the bigger recent one some day! :)

    _DSC3479.jpg

    _SLY3027.jpg
     
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  5. RoryH19

    RoryH19 Full Access Member

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    350 TBI, LS Swap 6.0, 350 carb
    Thanks.
    I think that's what I'm going to use. That way I know everything will bolt up with no issues.
    Now just need to find one.
     
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  6. MatrixFab

    MatrixFab Junior Member

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    Anyone have a build breakdown or part number data sheet? Interested in the swap.
     
  7. SirRobyn0

    SirRobyn0 Full Access Member

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    So here is my question, why would you want to do this swap? I've been a mechanic for pushing 30 years, so I know the standard GM vac system and the hydroboost system and have worked on both. I've also owned both. For me I do not see the appeal to hydroboost except where there isn't enough room for a vacuum booster, or perhaps if your converting to a diesel. for me I don't like the brake pedal feel. I'm not trying to discourage you at all, I'm just curious.
     
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  8. eskimomann209

    eskimomann209 Full Access Member

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    Or a large cam. Hydroboost is good for those too.
     
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  9. roundhouse

    roundhouse Full Access Member

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    The 6.2 diesel squares had a hydro boost from the factory

    Should be a bolt in deal
     
  10. Craig 85

    Craig 85 Full Access Member

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    Here's info for a 79-84 HB system. I know the mid 85 to end of model year 86 is a little different due to the accessory drives being modified for dual smog pumps.

    Hydro boost diagram.jpg

    Hydroboost parts list - Part 48 brake pedal return spring.jpg

    Hydroboost.JPG
     
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  11. SirRobyn0

    SirRobyn0 Full Access Member

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    I could see that.
     
  12. MatrixFab

    MatrixFab Junior Member

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    Thanks Craig 85! Very helpful data.
     
  13. Keith Seymore

    Keith Seymore Full Access Member

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    I'm kind wondering, too, why would use a newer hydro boost setup when you could use one off a square body.

    Unless you already happened to have a newer one.

    K
     
  14. RoryH19

    RoryH19 Full Access Member

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    Engine Size:
    350 TBI, LS Swap 6.0, 350 carb
    It's more about availability. I run across the 2000's all the time. Hardly see any squares that have them.
    I would prefer to use a square one.
     
  15. Keith Seymore

    Keith Seymore Full Access Member

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    Understood. Makes sense.

    K
     

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