Yes you can get bigger biscuts made but make sure who makes them hardens them right. I've had lads say oh i can get them cheaper then i get them do a hardness test on them and they are no good.
Another way is to get new tappet buckets and put small shims on top of the valve stems.
Frank i wouldn't double up on shims in the buckets no very good at all as they could be flicked out by the cams.
The above two ways are the only real way of doing the tappets right. There no cheap way of doing it and it very crucial to the engine running and performance
