I wouldn't say safe, but if you aren't afraid to pull em and oring em later (I would think you could do it with you eyes closed by now) I would give it a shot. I wouldn't reuse any older hardened oring for sure, but 8k miles should be about the same as pulling em a putting em back in like you had to pull out and reuse orings on the same job or something..., but if you wanna save 100 bucks on rings, may try it, I would just keep an extra close eye on oil, coolant, and fuel in the filter (err, I know you have a fuel system, so how would you do this???look at return fuel?), for a hundred miles or so before I took the trip...may even hook the trailer with a little load on it pre trip to pull it and get the icp up high. I don't know though, with the twin pumps and your tunes you may be able to get your icp up without a load.