I have a 49 1/2 ton and starting to work on steering problems (steering wheel has 1/4 of a turn slop in it) but while I was on the under side looking around I saw that the truck has no shocks on it. I can see where there has been shock brackets added but never any shocks. My question is do I need to take a measurement from top bracket to bottom bracket or is there a standard shock for a 49? I will need them for the front and back. Thanks for any info.