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Conversion Kit, Used to convert Non Adjustable Pontiac 400, 455 to Fully Adjustable

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Product Description

Adjustable Rocker Kit for Pontiac with screw in studs.
Fits: Select Pontiac Heads with Screw in Studs

Here we have a kit to convert select Pontiac heads for full adjustability.

Most stock Pontiac heads, have stepped or bottle neck type rocker studs where the rocker nut is simply torqued down- no adjustment option. 

Over the years, when the stock valve train wears, lifter adjustment may be needed to get rid of lifter noise.

This kit can be used to convert some Pontiac heads to fully adjustable rockers but please note- your Pontiac heads must have screw in rocker studs, will not work with pressed in studs.

To determine which stud type your heads have, just look at the base of the rocker studs. Screw in studs will have a built-in hex nut at the base of the studs. To removed screw in studs, just unscrew them with a wrench or deep socket.

If your heads do not have the jam nut at the base of the stud, they would be the pressed in type and this kit will not work. If your heads have pressed in studs, the heads can be converted to screw in studs but it requires machine work and 7/16" heli-coil installation.

This kit is not intended for use with full roller rockers, its is intended for use with stock Pontiac stamped steel rockers because the rocker fulcrums and adjuster nuts are not needed for roller rockers. If you have roller rockers, you only need to order the studs which we offer separately. See note* below.


        Kit Includes:

  • 16- Rocker Studs
  • 16- Conversion Rocker Fulcrums- Specially grooved to improve lubrication between rocker arm and fulcrum.
  • 16- Crimp Style Rocker Nuts (To be installed with ample lubrication, do not assemble dry!)
  • See pictures for actual parts included.



     Rocker Stud Specifications
  • 2.585" Overall length 
  • 1.775: Under Jam Nut to top
  • .800" Top Thread length
  • .625" Base Thread Length

     Rocker Fulcrum Specifications

  • Diameter:
  • Height:
  • Center Hole: 7/16"

     Rocker Adjuster Nut Specifications

  • Hex Size:
  • ID threads- 7/16-20

All parts are manufactured in the USA. This conversion kit is compatible with stock valve covers.

Note* For those who want to run full roller rockers, you'll only need the rocker studs which we offer separately. If this is the case, make sure the adjuster nuts (poly locks) which come with your roller rocker are 7/16" and not the smaller 3/8" type. Most come with 7/16" adjusted nuts but you will need to verify that on your end.


Have questions? Feel free to contact us.


Alex's Parts~


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