link length/ position affects performance? how
 

any ideas on this. not sure how big of deal it really plays as far as how long my uppers are or lowers for that fact. also how big of difference does it make when you move your links up 1 or 2 postions or down 1 or 2 postions? any input?

What truck are you talking about? Stock Chassis or aftermarket?

This is something to search you specific truck's forum for, I'm betting there is a thread or two on this subject.

Here's a big 'ol thread on it....

http://www.rccrawler.com/forum/general-crawlers/54791-anti-squat-suspension-tech.html

hahaha. you start looking in dark corners for this "simple answer" and you will start to learn that moving 1 little thing affects the whole suspension. search around here and online about : antisquat, squat, torque twist, 4 link geometry and you will see it is an art. for RC i say it affects the trucks about 10%, real truck is huge.