As I undestand it the Buick/rover engine never had a roller cam installed from the factory. This really surprises me. I will keep oil that has the right amounts of zinc/antiwear ingredients.
Will Buick parts still fit on these new blocks or did rover really reengineer the engine.
Feel free to to rant and thanks.

 

Hardily anyone installed a roller cam from the factory and no the cam has been changed from the original engines.