If you can make it work, the
NSW RMS RVD is a great resource for these questions. It contains all the details for cars that have gone through the RMS
The spec sheet for a 2004 C70 (and also for 1999 ones) has the arch to centre as follows:
- Vertical Measurement wheel centre to top of wheel arch opening at unladen mass: F 390mm. R 390mm
- Vertical Measurement wheel centre to top of wheel arch opening at full bump: F 296mm, R 291mm
- Minimum acceptable vertical measurement wheel centre to top of wheel arch F 370mm, R 370mm
The CPA Number is 11796-562889, or you can find via:
Post-1999 RVD > Car > Volvo > 7
Hope that all helps,
Ed