You have to check cam setup... Roller or flat lifters.
Does mater to order parts.
If you have flat lifters... find a engine w/ rollers.
See my Cave, Duke Quick Ref
You best bet is just find another engine w/ roller cam setup.
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)