How much boost? I assume E85?
I have the street sleeper kit on my 2016 with journal bearing precision 62/66's on E85. I've never had it on the dyno, but as far as I can tell I have not experienced valve float. My kit also has the boost actuated cutouts which may help.
Why not just go with a different supercharger and a custom tune then? Your going to just be spending money twice if you do a tune/cai now and then a supercharger down the road. The tune isn't worth all that much if you don't have access to E85 anyway.
Are you going to go the Roush supercharger route because of the warranty? If so, why would you potentially void the warranty now before the supercharger goes on? Also that Roush warranty starts from the date/mileage you bought the car, not when the supercharger is installed. Just something to...
I have a dynotech driveshaft in my car. No vibration. I read the posts about DSS and avoided them. I would have no problem recommending the dynotech driveshaft. I think they make the driveshafts for NASCAR too.
I doubt its totaled, but without knowing the year and mileage who knows. A creampuff with low miles, probably not totaled. A 2015 with 120k miles, might be totaled.
Its all about the value of the car vs cost of the repairs.
We have a 2020 Telluride that my wife mostly drives. Bought it new in March of 2019. No problems with it at all. It's a really nice vehicle. 10yr/100k mile powertrain warranty. The only problem with buying one now is that many dealers are charging over MSRP.