Cam Selection Advice

I gave IMM a call this morning, had a good chat. The springs in the head now would work for a hydraulic roller cam but the pushrod holes needs to be opened up more. He gave me some pointers on how to do that but I may send them back to IMM to have them re-set up the heads. He also said the rockers are good to go at 1.5 but to thoroughly clean them and make sure to knock all the flash from the inside of the shafts.