[FED 387]

Also make sure you don't have the starter "cocked" in there a just little bit crooked---the 2 bolt holes they machine in the starter generally are not done the most accurate way possible either--the old paperclip deal is usually pretty close to where you want to be anyway---also ALWAYS have a spare starter and or starter drive---these things crap out on you at the worst imaginable times and you can change a starter out in a few minutes if need be--FED
387