If you are not used to having a front one-way unit...this will be new for you. If you are on a tight track I would strongly recommend getting the alum.diff. for the front too. Easier to drive. As well, get the diff from mdi racing and they will do the blade-conversion for free. You only pay for the plastic blade tip things. $2.50 USD. see 'em at
www.mdiracing.com