The higher compression ratio will give you better throttle response at the lower RPM when driving under vacuum up
Which will also allow the intake manifold to remain cooler as air does not heat up under vacuum, it is a bunch cooler than with boost work scope
The amount of under drive will determine what RPM the blower starts to make boost and the amount of boost will determine how much heat will be made at what lbs. of boost. The bigger the blower, 6.71,8.71, 10.71 or 14.71 the less heat it will make at the same amount of boost due to it turning slower than the smaller blowers will have to make the same amount of boost on the same engine work Bigger is better when it comes to blower size up

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)