the Buick 225 v6 is closely related to the Buick 231 v6. most of the difference between the two is the bore size and the split throw crank on the newer 231.
it's also very close to a Buick or Rover 3.5L v8. any Rover engine man should be able to help you out.
it's also very close to a Buick or Rover 3.5L v8. any Rover engine man should be able to help you out.