real sizing a diagram

#1
i have a diagram of a mk1 ford escort.my question is there a programme i can use to give me the scale of the diagram to get the real car size.there are measurement on the diagram but i need the measurements of the rear quarter panels as mine have rotted away so i can get some made for me any ideas
 

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#2
Hello. Very nice drawing. I have inserted it in Autocad as an image raster, and can tell that you can work with 1/10 scale. I have measured some dimensions and fits very well.
So when you import the image say the scale is 10.

I hope this will help.

Regards.