Thats really cool and all, but seeing that this is a lawnmower racing forum, and not a "fix my grasscutter" forum, you do not need the release.
Judging by the fact that it has been stated there is a different air filter and exhaust installed, one could assume it is being raced, and not mowing lawn.
There are literally hundreds of Briggs singles being raced across the country that have increased compression, reground cams and the like, all with no release, that are able to start...
But, what do I know?