A/C Compressor 'O' ring specification please

[rhino666]

Hi

I am having to refurbish a number of Aircon Compressors from Mazda Eunos(Miata) 1.6 cars.
These are from early cars 1989 - 1993 and would have originally run with R12 but will be a dropin replacement now.
The body seals are leaking so I will need to replace with seals of the correct specification.
I can easily find shore 70 NBR seals and hoping these will be OK?
Any comments/advice here much appreciated.

[tbirdtbird]

Should be if they are dimensionally the same but I think it prudent to wait till some of the board experts weigh in