Quote:

---

Quote:

---

Quote:

---

If there is no obvious wear at the fulcrum of the rocker to shaft area they're good.

EVERY old Mopar big block I've torn down had some play, in the fulcrum, that was taken out when the oil pressure went up. Not an area of HIGH tolerances held when manufactured as far as I'm concerned. Or maybe it didn't matter when they knew the lifters would compensate.

If you have a replacement PERFORMANCE cam it may have a "smaller base circle" of which is known to cause more valvetrain noise. The fix is longer pushrods or adj. valvetrain.

---

I have a set of stock ductile iron adjustable rocker arms for a big block. Do I need different rocker shafts or can I use the original hydraulic rocker shafts that were for the stamped steel rocker arms?

---

I've used ductile iron rockers on stock hydraulic shafts - they galled-up pretty bad

---

Use the proper shaft for those ductile iron rockers. You don't want to play around with the
valvetrain by mixing parts. Unless it is recommended to do so by the factory bulletins, DON'T switch hydraulic shafts and the solid rocker shafts around unless you CHANGE ALL the components in the valvetrain.