After machine work on the heads and block I am concerned with the stock valve adjustment proceedure of torqueing the rocker arms to 20 ft/lbs. With the stock non adjustable rocker arms the lifter plunger is .160" compressed. The total plunger travbel is .210". The lifters still have .050" spring travel before they bottom. I read the Jim Hand article that said the factory adjustment has the plunger placed mid travel (.100"?) of the lifter. Will the lifters operate properly with .160" preload? This is about two turns past zero lash.

After machine work on the heads and block I am concerned with the stock valve adjustment proceedure of torqueing the rocker arms to 20 ft/lbs. With the stock non adjustable rocker arms the lifter plunger is .160" compressed. The total plunger travbel is .210". The lifters still have .050" spring travel before they bottom. I read the Jim Hand article that said the factory adjustment has the plunger placed mid travel (.100"?) of the lifter. Will the lifters operate properly with .160" preload? This is about two turns past zero lash.

What are the casting numbers?

"Somebody sell me a 78 Catalina grille, please",15 yrs in NHRA tech ret. Winter Sucks

[This message was edited by tikiklubracing on December 29, 2003 at 01:31 PM.]

Any ideas anyone? If the plunger is not bottomed out will it operate as designed?

The easiest way to convert to adjustable is to buy Crane's Kool Nuts. These will work on the necked down studs and have a Hex lock nut on top. They are around $35. Jim Hand and others have articles on adjusting lifters.