the dyna street bob has a big 49mm fork i dont think all dynas do not totaly sure thou

 

i have a 1984 flt with a frame mounted fairing with air ride front suspension...what parts do i need to change to a standard big single headlight and tins ...is it a triple tree change or can i simply turn my trees around ....or do i need a new front end ..or ??????
thanks for any help