Silver engine are virtually the same as all early years. Those parts common with TS and TC 100 and 185. The 76 also the same for those parts. Headlight changed in very early models but i doubt you will find a good flat bottom unit anyway. I see the parts your after on fleabay all the time. I will have a look and see if I have anything usable. I do have a use to be chrome headlight thats pretty rusty but solid and maybe a top triple, speedo i dont know if i have a spare. 76 black engine, headlight bucket is black.