What kind of circuit breaker?
Does it have a delay?
What overage can it tolerate and for how long?
Is it a fast one?
I am making a point. There are many types of fuses and circuit breakers for various situations. Some are designed to take a pretty good surge current before they trip other not so much. So you really need to consider the which breaker? What are the specs.
As I like to point out all too often, fuses and breakers are there to protect the wire from exceeding its current carrying and get hot enough to cause damage. A toaster does not pop a breaker, but sure can catch fire.
You also need to consider where the breaker is designed to work. Some really are not made for outdoors use and may not like being on a car.
Yes, I know people have 'successfully' done all sorts of stuff, that does not mean it is correct. It is not very uncommon for people to have a failure of the fuse holder make the car stop running or not start. Many who have fuses do not understand electricity so they have to call a tow. Truth is the A with a good harness does not really have electrical problems. Well that is until you start adding in some repro electrical parts it seems.