I just had a pair of 906 cast iron heads fully reconditioned. I was going to use a set of new steel stamped HD rocker arms, shafts and pushrods. To get the recommended hydraulic lifter preload I used .030 +.020 steel shims under the rocker shafts. The new fast ramp cam had a larger base circle and the heads were milled.

At the final valve train assembly torqued the shaft brackets to 25 ft.lbs. and now I noticed that ALL rocker arm stands were cracked. Some had one crack, but the worst had three in the radius of the stand. Deepest crack was almost 3/4".

I guess I am not the first one who has got a problem like this, but how have you solved it?