I put mine on just any ol way.

Go to a hardware store and get a grade 8 threaded rod and a grade 8 nut. That will pull it on without stripping any threads inside the crank.

 

after i reinstalled mine i have a vibration at 2k. i'm getting a keyed crank hub from thunderracing.com for christmas. Thanks mom and dad! i thought i had it on there right, but the lt4 conversion winds up pretty quick and i think it may have skewed a little, so i'm going w/ the keyed hub for piece of mind.. plus couldn't think of anything else to get from my folks.