IF HE IS A NOVICE HE SHOULD LEAVE IT BONE STOCK, WITH THE GOVERNOR LEFT WORKING, AND NOT MODIFY IT TILL HE GETS EXPERIENCE AND KNOWLEDGE TO DO IT CORRECTLY. SO Murray_Wide_Body, IN OTHER WORDS IF YOU MODIFY ONE OF THESE ENGINES YOU WILL NEED TO USE A BILLET ROD AND FLYWHEEL. THE STOCK ROD WON'T TAKE 6,000 rpm's FOR VERY LONG AT ALL.