99-07 classic 60E's are the exact same. the 07-08NNBS trannys are the same also minus some inside parts.
flex fuel is good like said..bigger injector which means better cam choice
i wish i would have gotten a steal like that on my motor damn good deal man. change the tb to a dbc from a 99-02 intake or find you one already p&p. if you wanna upgrade then you could snag a NNBS intake an a dbc 90mm tb an have a strong top end