Just want to add some context here because many posters have misconceptions on reverse.
Sarfraz Nawaz discovered reverse towards the late 70s. He shared it with Imran who was hitting his bowling peak just after a successful WSC series.
With a remodelled action perfect for inswinging and 90MPH pace, Imran introduced reverse at full mastery in the early 80s. His trademark with the old ball was to pitch it close to the stumps and unsuspecting bats never anticipated the swing. Pitching it up with the old ball like that was contrary to the practice of the time.
Nobody doubts that tampering and home umpires helped him but it is reductive to mostly attribute his success to that. Firstly, he only admitted to once using a bottletop in a first class game as a point to our what he saw as crossing the line, not that he regularly used it in tests where it was scratching and scuffing the ball on the hard surfaces. He had no need to make that admission if bottlecaps were his regular forte.
Reversing it was not just a home achievment. IMO it was not just his skill but the fact that reverse was a new phenomenon that led to that success. He used it in Australia (taking 16 wickets@19) when he famously got Chappell in trouble and carried it to England (taking 21 wickets@18) where he also successful. At the time the late reverse inswinger was called the inshoo.
Here is him using it to dislodge Chappell in a beautiful trap.
And here is Richie Benaud in England in 1982 talking about the mystery of reverse, how much trouble it caused bats and how Imran managed to do it while others could not.
By the time the 82/83 series against India came along, it was the combo of all factors, Imran at his peak, his home umpire advantages, tampering but mostly the conditions that made it easier for the ball to scuff early and Indian bats who had never seen the old ball swing.
The reason I rate Imran as the best was not just that he was the one to truly master it but he has so many spells of running through sides, home and away, with reverse at a level of destruction Wasim never managed.