I never gave anyone any advice whatsoever I just passed on some contact details. And going on the subject of cvh cams I spent my entire youth working on them and having them as daily drivers and lost count of the amount of them I had to swap bits over to keep them running. In fact me and the guy I was apprentice to build a very early Zvh in year 2000 I think it was, I put a second hand cam in that out of a rotten xr3 and 15 years later that same engine is still going in the xr2 the engine ended up in and apart from regular servicing it's never gone wrong. But yeah your supposed to change cam and tappets for new or keep them matched but sometimes due to lack of availability of parts or funds then u do what u have to do.