The last post about this was 8-19-05 and nothing has been done to change the typo. Perhaps someone is waiting to get an official definition. As a former National Hare and Hound champion I can assure you that it is
The air flow is not completely cut off and the air is flowing much faster (high vacuum) than when accelerating. A sudden burst of lean mixture will wipe the alum over the rings of very fast moving pistons. It not like running a lean mixture under power, that will do more damage.
In desert racing we need to be careful after crossing a dry lake bed, if you are running wide open and suddenly close the throttle you will be running very lean until the rpms drop and the carbs start delivering the proper mixture. The needles are keeping the fuel from getting through the main jets and your rpm is pulling in a lot of air without enough fuel. It is better to roll the throttle off at the end of a high rpm section.
You only want the new wide arms on the outside and use the short arms in the left. In this photo you can see the inside arms are a lot shorter than the outside arms.
The year is the tenth letter/number of the VIN
1988 = J
89 = K
90 = L
91 = M
92 = N
93 = P
94 = R
95 = S
96 = T
97 = V
98 = W
99 = X
2000 = Y
2001 = 1
2002 = 2
2003 = 3