Yep, a simple Bendix or Airflow performance style injection system. I reckon it could have two settings, and being mass airflow designs they could have a F/A ratio set for take off and climb, and one for cruise and descent.
Piece of cake with the right motivation. That and proper cooling, or even the Rotec water cooled heads. which would mitigate that issue. Although I prefer a proper air cooled design, it works well for Rotax and seems to work for others.
Along with some material changes on valve guides and we would solve most issues easily. I am not sure the hydraulic lifters are the go, and with the old solid lifter engines (less problems) and better F/A ratio's and cooling, most of the head creep would go away.
I see a solution…..if only we can get them to have me around the table. If anyone is reading this that matters.