Apart from the actual 'pretend' mufflers the bike is stock standard ~ Would have to confirm with the muffler/s actually they may be the stock as well as it was not intended as a road bike ~
Tje original 1967/ 1968 HORNET/ A65FS ( Firebird Scramblers) were very special item even down to the crankshafts being nitrated etc After all they were a competiton machine ~
I never liked the single lever brakes exexially compares to the later (superb appearance) Tri-BSA TLS of 1968 onward!