Did a few searches with not much turning up on if there is a huge difference in the regular "ford friction mod" for LSD and the "ford racing friction mod". My particular application will be in a freshly rebuilt 3.73 with solid pinion spacer kit from Wier performance.
Here's a link to the "racing friction mod":
http://www.amazon.com/Ford-M-19546-...149944&sr=1-2&keywords=ford+friction+modifier
Here's a link to the "racing friction mod":
http://www.amazon.com/Ford-M-19546-...149944&sr=1-2&keywords=ford+friction+modifier