[Chrispbrown36]

1987 GM trucks were designated V's for 4wd and R's for 2wd...I have heard that it was that way for a few years but I have only seen it mentioned pertaining to the 87 model year. So essentially it is a K10 I just prefer saying V10 because the guys at the auto parts place give you this high and mighty you have no idea what you are talking about until they look it up. It always makes me chuckle!
The original invoice lists 3.08's but I am with you in that if the limited slip was added then there is a possibility that a new ratio was put in. I will be checking tomorrow as long as the rain holds off and will try to get some good pictures.