I just picked one up this morning.Matching engine and frame numbers.Bought of original owner who raced it in Sydney.In order to keep up with the Jap bikes of the late 70s early 80s he modified the frame to take forward mounted rear shocks and added a yz front end.Not eligible for pre75 but should be allright for pre78.He also added a hand built up pipe.I have started to go through it,pretty good all over except rear shocks,checked the air filter and its one of those disintergrating unifilters described in another post.Came with a brand new spare and that is falling apart also.Cant wait to get the shocks done and a new airfilter,clean carbi,change oil and get into it!Will post some pics when have time.