[FatBoy]

Hi Paul,
I tried a variety of different shafts but they all broke eventually. I don't think it is specifically down to Crane components unless their valve springs are especially tight.
You don't need to change the cam or pushrods (except for the bent ones). I would suggest you get the best steel shafts you can and get a set of end post supports (I'll try to find a link to a supplier, but I'm sure someone else will step in). I used a roller setup which so far has proved completely reliable but that was about $1K.
As I said previously, I don't think you need to worry about the rest of your engine. The only slight difficulty is that the cam follower from the broken rocker is likely to have popped itself out so you may need to take the inlet manifold off to get at it to put it back where it belongs.
REgards
Paul