big problem for a leek

[elektrik]

can somebody give me a answer on the next question? I have a bug from 69 bud the frame is totally hopeless, I can by a good frame from a bug from 73, is that a problem or not. I now that the seat frame is different bud I m not worry because I gone put sum sparco's in it. tee only thing I am not now is of the body fit to the frame?

sorry if y put this message in the rung directory
thank you for you advise