eddy heads and what rockers to use?

Sorry about bringing the true cause to your attention. Some blocks need the smaller circle, others don't.

A custom roller won't be much more than the one you can buy at summit from some of the good cam guys, but I digress.

Good luck with your build and go scream at crane...

PS - if you'd have asked on this board about using a hydraulic roller you would have been suggested to get a reduced base circle by more than one person. :-D

Have a great day!