Welcome Legion Rider:
The '06 and later Dyna frame added about 1/8" top to bottom at the neck ... but, the FLST fork parts did not change ... still pretty much a bolt on operation once you clearance the stock Dyna fork stop and the inner faces of the lower triple tree (see Ackman1968 post on the subject for a more detailed discussion
https://www.hdforums.com/forum/4066856-post20.html.) ....
Several of us have gone with take-off parts from craigslist or e-bay ... a good way to save some coin (and be sure to sell your take-off parts to recoup some of the outlays) ....
Keep us posted ....
R/
'Chop