Boosting High Compression vs Low Compression M90 Setup

[Anthony Smith]

typically you'll run out of pulley options with the L67 block a lot sooner, but setup right both are capable of spinning the m90 way out of it's efficiency range.

Exactly, if your going for maximum power and plan on running enough octane to support it high compression will get you further. Once the m90 is out of steam you have to make power somewhere else, at that point more compression and better airflow are your only options. Or nitrous that works too I guess.