I am currently looking for axels from a k20 to swap into my Blazer. I was wondering if it makes any deferens if the axels that I swap into have locking differential or not? This will be my dd, no mudd! /forums/images/graemlins/crazy.gif I was also wondering what the easies way of checking my rocker arms is? The engine is dissembled already, I need to have them mounted to check them or? and what to check for? Its an 86 Blazer if that will help!