Any of the new systems will flow up to 1200cc without issue. If you want take a look at the info and see what questions arise. The HFS-3 and 6 have the full complement of failsafes and the HFS-2 uses the same injection hardware without failsafes.

http://howertonengineering.com/aquamist_systems.html

Here's the main product page with detailed documents attached.