I can imagine having some trouble fitting parts for an M8 to a Dyna, almost everything is different. Contact the manufacturer and see if they have a solution.

 

the piece that's giving me grief is actually the rear fender mounting bracket.




the threader piece from my kit to fit the M8 fits inside like a glove and I can thread my turn signal in...but the mounting bracket won't go back in, so only way to make this work is to get rid of the bracket?

 

No idea what that is but M8 is either a thread or an engine designation... What are we actually talking about?