First off, sorry I am sure this has been covered, but search was acting up for me. Will the 07 Big Sucker fit on an 08?

 

Yes it will

 

harley has a different part # for their 08 and later dyna kit.... may be due to the fitment of the oem a/c cover....

 

Thanks..am getting rid of the Stock cover and set up.. going with the BS and a round cover.

 

Yes the part number for the 08 is different because the shape..
BS or SE is round so they say the stock cover wont fit due to shape..
So as long as you have a round cover for the 08 w/the bs your fine.

I just did this last week myself..