I'm setting up my 250sx (300barrel) to run more like a 300EXC. I have installed the green power valve spring. I'm having spark plug trouble. The 250sx (BR8ECM)standard plug is a colder plug than the 300.(BR7ES) because the 250sx engine is assumed to be revving at high revs more often than the 300exc it produces more heat. it runs a colder plug to reduce the risk of overheating. I'm considering running the 300exc plug. Has anyone done this experiment?