Choosing the right Adjustment Nuts      

Because the Jomar Stud Girdle is designed to mount above the rocker arms, extended adjustment nuts (poly-locks) are necessary to provide the required mounting capabilty.

Pro-Model Girdle Bars
  • All heads with in-line studs use 2.0" Adjustment Nuts.
  • 351C Ford, 460CJ(A429), Ford Blue Thunder use 2.2" Adjustment Nuts.
  • BB Chevy uses 2.6" Adjustment Nuts on intake studs and 2.0" on exhaust.
  • "A460" Ford (TFS or SVO Heads) use 2.6" Adjustment Nuts

  • Ultra-Lite Girdle Bars
  • All heads with in-line studs use 2.0" Adjustment Nuts.
  • TFS SBC G-2 "Twisted Wedge" heads use 2.2" Adjustment Nuts.
  • BB Chevy uses 2.6" Adjustment Nuts on intake studs and 2.0" Nuts on exhaust.

  • Note: All Adjustment Nuts come in packs of 8. You will need 2 packs to equip both heads of an engine. Thats why when your ordering Stud Girdles and your selecting adustment nut options, you see "qty of 2".


    Rocker Arm/ Adjustment Nut Base Dia. Cross Reference
    Harland Sharp 1.73 ratio .600" Diameter Base
    ...Not finished ...Not finished
       

    Note:If you don't see your rocker arm in this chart don't panic! Just give us a call at 248.322.3080 and we will try to help you. You can also contact us through our Contact Web Page.

     
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