Tracks could purchase for random distribution on race day or require sealed serialized units from a specific manufacture installed.
Pretty simple solution is install what ever engine you like and it's performance will be controlled by the "rate of acceleration" and "maximum rpm".
as an example:
https://patents.goog...atent/US6112719
Sense firing of sparkplug or coil for input to control the firing of the sparkplug
If you can set maximum rate of increase for sparkplug firing you also will set maximum rate of acceleration.
High cost engine work now is to be able to maximize the rate of acceleration or maximize it at either the top, bottom or middle depending on needs.
If you could no longer alter the rate of acceleration you would be wasting your time to build an engine to anything other then being able to meet the maximum rate of acceleration.
It is and would be simple using traction control to equalize engine rate of acceleration instead of the car's rate of acceleration.
Gearing is not variable so you would still be able to best match gearing to your track but everyone's engines would all accelerate at the same rate.
Outcome or how fast a car is would become totally dependent on setup, driving and weight.
edit: It would also eliminate any expensive need for selling and promoting speck and seal racing engines because it would be a cheap alternative to speck and seal.