To use Arca-Swiss type plates and L-brackets, all you need to continue to use your tripod is change your ball head.
We are convinced the Markins ball heads are the best and have hundreds of testimonials on that, but can also recommend the Arca Siss Z1 and the Novoflex ClassicBall 5.
Independently of tripods, there are Arca Swiss type and there are No Arca Swiss type tripod head clamps, plates and L-brackets.
Manfrotto was an Italian pioneer in camera support systems (ball head/plates), unfortunately they chose a proprietary design that had you locked into their brand only, for plates. That would have been OK if the design worked for larger pro cameras and lenses. The same happened to Gitzo ball heads, also a tripod pioneer manufacturer out of France.
Manfrotto was the enthusiasts market standard for long, on a world-wide basis, but never the industry standard they may have wanted to become.
It was not until the early 90s that Arca Swiss -mainly a medium and large format camera manufacturer- popularized their modern Arca-Swiss type system, with 38mm wide plates and a 45 degrees dovetail for effective (not moving at all) clamping, most with anti-rotational flanges.
The true professional ball head manufacturers of today use the Arca-Swiss type clamps and plates and many other lower brands are following, however with various degrees of success.