There is no easy way, and my preferred way is to remove the complete engine.
All HR engine parts are in stock including valves etc.
I also have complete cyl. heads with valves, buckets, cams etc which are ready just to drop on to the block
I also have complete HR engines in stock and I can take your damaged engine back and give you an allowance..
Just drop me a PM if I can help you further:
Alex.