I purchased a pair of Progressive 11 Inch shocks from someone on Craigslist and when I brought them to the shop to have them install them on my 07 FXDL, they told me they were too short and would not fit. The part number for the shocks is 412-4037B. Everything I read online says these shocks should fit my bike. Are there any steps the installer needs to take to put these shocks on the bike? Thanks in advance.