Hello.
I heard of no special considerations for PBR on 7600.
The only thing[s] you should care about are bugs (for example, CSCuh58335, CSCta68249 and etc.).
Also here are some details of PBR restrictions:
http://www.cisco.com/c/en/us/td/docs/routers/7600/ios/15S/configuration/guide/7600_15_0s_book/layer3.html#pgfId-1027016