Crane Rocker arms

[XS29L]

Does anyone know if Crane Ductile Iron rocker arms require harden shafts or will stock shafts do the job ? 

[Cooter]

I run them and most rec. New shafts.
I believe all are hardened aftermarket.  So yes you really should get new shafts just to be safe.

[XS29L]

Thanks for the info.  I have a set of new stock shafts for stamped rockers but I was pretty sure I would need hardened shafts for the ductile iron rockers.  Thanks again Cooter.       Paul

[68CoronetRT]

Just in my own experience, I ran the stock shafts and so far they are working. Dont forget to get lots of shims to space it correctly, I'd also requiremend the mancini kit that makes the hold downs a stud instead of a bolt.

[XS29L]

Thanks for the tip , I'll look into the additional hardware.   

[Challenger340]

It's the Dissimilar Metals running on a "film of Oil" thing.....Ductile Iron Versus Steel...... NEW, or good shape stock shafts will work fine for most(as long as they are not all dinged & worn out)...but as spring pressures and loads/rpm increase...always "nicer" to widen the Hardness difference between the two.... by going for the Chromed Shafts.
SBI sells the Chrome Shafts....and they are cheap.