if u mean the mounts that go from the core support to the front cyl head then, the engine side of those are different between the 3.1 and the 3.8. the bracket that bolts to the core support are same though. the dog bones are prob the same as well but not certain on those.

now, does my gp has a 3800? yes it does.

and not tryin to criticize, but please use a period in between sentances. that was a lil confusing. i think i got it tho.