Jomar Performance - Choosing the right Adjustment Nuts

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.