the problem with the rear mount is ground clearance.
Theres no way to run the intercooler piping under the car without it hanging down.

I think i've found a way for intercooler piping to run in the transmission tunnel but have to look into it.

10:1 is perfectly normal, I've boosted motors as high as 13.5:1 without issue
Our motors have forged internals, and the domes of the pistons are iron coated, meaning they can take higher combustion pressure and temperature, the iron coating extends to the first ringland which means there should be few issues there.

The srt motor is virtually identical, only difference is the compression is down a point.

You can actually make more power with 10:1 vs 9:1. The NA motor has 2.8% better thermal efficiency than the srt motor, meaning with proper tuning you can make more power per lb of boost.

Im looking into a rear mount setup on my car, as a standard turbo setup is just too labor and cost prohibitive for the gains.