I am working on 2000 Land Rover with a 240 CI aluminum engine. Is that a Buick motor that has been enlarged from 215 CI? Does rocker arm parts from a 215 interchange with the 240 such as plugs in the ends of the rocker arm shaft? Land Rover parts are hard to find and expensive. Buick parts are easier to get if they will work. If anyone knows anything about this do not be bashful chime in!