What do you guys recommend for shafts/hold-downs for Crane ductile rocker arms? Thinking of going with 440source's hold-downs, but not sure if these (MP) type hold-downs work with these rockers. Someone told me you also need banana grooved shafts for these rockers...yes/no?? This is for a street car with a mild street/strip solid cam. Thanks

Bannana shafts are highly recommended though plenty are running without them...I'm running a set..

I have the 440 source hold downs on my Isky ductile iron rockers, they are fine but make sure you use a steel rocker shim between the holdown & the rocker arm...Mine actually required about .060 worth of shims to properly center the arm on the valve stem...