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Pontiac 8 lug to disc brakes

Discussion in 'The Hokey Ass Message Board' started by basicbob, Dec 1, 2012.

  1. basicbob
    Joined: Nov 2, 2003
    Posts: 737

    basicbob
    Member

    Hello, I need help/info how to put disc brakes to 1961 Pontiac 8 lugs! Can I use normal GM spindles & parts or????

    Thanks in advance, Bob
     
  2. 55chieftain
    Joined: May 29, 2007
    Posts: 2,186

    55chieftain
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  3. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 8,683

    mgtstumpy
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  4. jratz1966
    Joined: Nov 11, 2009
    Posts: 104

    jratz1966
    Member

    Hey scarebird on ebay sells a kit that uses later model gm parts,you get caliper mounting bracket and bearing spacer for under $200,they also offer a kit for the rear.Look under ebay item #370477744047 for front kit.this is a nice simple kit,I used one in the past and worked real good.

    Jratz
     

  5. Mr48chev
    Joined: Dec 28, 2007
    Posts: 28,532

    Mr48chev
    ALLIANCE MEMBER

    True he does and for many cars Jratz1966 but that doesn't help Basicbob keep his 8 lug wheels. That kit uses 5 lug wheels. On this deal I'd think it's spring for the 2K setup or go to five lug.
     
  6. PackardV8
    Joined: Jun 7, 2007
    Posts: 890

    PackardV8
    Member

    IIRC, the 8-lugs are 14". That will limit the size of the disc setups which will fit inside, regardless of what will bolt to the spindle.

    If cost is no problem, several wheel companies would be happy to make 16"s with the 8-lug centers, then the more common GM disc setups become a possibility.

    jack vines
     
  7. jratz1966
    Joined: Nov 11, 2009
    Posts: 104

    jratz1966
    Member

    my bad,didn't catch the part about keeping the 8 lug,I know a guy who took a pair of rear 8 lug drums and cut the liner part off like what roush does and bolted them on a 5 lug rotor,he had to buy a set of 15" outer rims from BOP ,but keeps the original look and alot cheaper then 2k that roush gets.
     
  8. 296 V8
    Joined: Sep 17, 2003
    Posts: 4,666

    296 V8
    BANNED
    from Nor~Cal

    It fairly obvious from this photo what needs to happen … id bet that’s nothing more than the face of a rear 8 lug drum bolted to a 5 on 5 rotor.
     

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  9. gimpyshotrods
    Joined: May 20, 2009
    Posts: 17,910

    gimpyshotrods
    ALLIANCE MEMBER

    Yeah.

    [​IMG]

    Looks like they trimmed off the rest of the bell on a rear drum, and bolted it on a rotor.

    [​IMG]

    I am fairly certain that if you can ID the spindles and brakes, you can do this too, for a fair chunk less than $2250.
     
    Last edited: Dec 1, 2012
  10. 296 V8
    Joined: Sep 17, 2003
    Posts: 4,666

    296 V8
    BANNED
    from Nor~Cal

    The easiest way to get a rotor on any spindle is to simply use the drum brake hub w bearings that already fits your spindle.

    In this case.
    1 Find the non 8 lug drum and hub
    2 Make sure it fit’s the spindle …. Remove drum.
    3 Take the hub with you to the parts store or wrecking yard and find a rotor hat that fits.
    4 Then fab up your own caliper brackets …. (weld on speedways are a good start)
    5 If diameter is to large for 14’s ??? id cut down the rotors until the caliper fits.

    Obviously you will need to do some leg work - do some cutting and welding - need a tolerant parts guy or two - possibly a friend w a lathe…..but its doable.
     
  11. stuart in mn
    Joined: Nov 22, 2007
    Posts: 1,895

    stuart in mn
    Member

    A friend of mine put the Roush kit on a 1961 Ventura. It uses new reproduction castings from Arrowhead components with the back half machined off. It worked out well, but it does space the wheel out about 1/2" so you need to keep that in mind when sizing your tires and wheels. You can get reproduction 8 lug wheels in 15" or larger sizes from BOP Engineering.

    As mentioned above, the kit from Scarebird is the cheapest way to go, but of course it uses conventional wheels. Also, the disk brake setup from a 1968-1970 full size Pontiac will bolt right on to a 1961 car, but the problems is the rotors for that setup are just about nonexistent, and expensive if you can find them.
     
  12. basicbob
    Joined: Nov 2, 2003
    Posts: 737

    basicbob
    Member

    Hello, thanks for all for the disc brake info (Arrowhead).
    Where do I buy 16" or 17" 8 lug wheels?

    I also need a rust free 1961 Pontiac hardtop drivers door. Catalina or other big car, I'm willing to weld up trim holes.

    Thanks Bob
    417-861-7988
     
  13. stuart in mn
    Joined: Nov 22, 2007
    Posts: 1,895

    stuart in mn
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  14. nxcess
    Joined: Mar 30, 2013
    Posts: 109

    nxcess
    Member
    from Mesa, AZ

    The stock Pontiac front hubs were spindle mount. You need to use rear hubs. There is a RH thread and a LH thread stud.
    When I built my 34 I used four right rear hubs.
    There is also a difference in the angle of the fins in the earlier and later versions. Don't remember the year difference.

    We change the bolt pattern to 5 on 4 3/4" BC.
    Made custom lug nuts and modified aluminum wheels to the 8 bolt pattern. Also made the hub caps.
    This was in 85. 34 Ford 066.jpg
     
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  15. nxcess
    Joined: Mar 30, 2013
    Posts: 109

    nxcess
    Member
    from Mesa, AZ

  16. nxcess
    Joined: Mar 30, 2013
    Posts: 109

    nxcess
    Member
    from Mesa, AZ

    34 Ford 011.jpg
    Sorry for all of the posts but it would not let me put them all in at once for some reason.
     
  17. I thought the 8-lugs were decent brakes on their own? Although if the drums are worn out you have an issue.
     
  18. GassersGarage
    Joined: Jul 1, 2007
    Posts: 4,728

    GassersGarage
    Member

    Along those same lines, does anyone know who makes 15" rims for 8 lug wheels?
     
  19. Poncho60
    Joined: Jan 23, 2011
    Posts: 242

    Poncho60
    Member
    from N Illinois

    see Stuarts earlier post for this thread...BOP Engineering
     
  20. poprockcrusher
    Joined: May 17, 2009
    Posts: 123

    poprockcrusher
    Member

    another unique historical option falling to trendiness
     
  21. flynbrian48
    Joined: Mar 10, 2008
    Posts: 7,084

    flynbrian48
    Member

    Yes. As I recall, those are some pretty good drum brakes, having had a couple 60's big Ponchos, and one with 8 lugs.

    Brian
     

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