I don't know much about Zukill, except I saw a tape of two of his fights when OG Posse sent them to me.
At the time, I didn't appreciate his style as much as I do now, which was a very powerful, unorthodox finisher.
He scratched low, with his head down, and would come up under a dog and flip them. He liked the throat and the kidneys, if memory serves.

I was more into head/face dogs, and did not appreciate a true finisher like Zukill. Especially considering he had no cutters.
As a producer, Zukill sired a 4xW and a 3xW from just a couple breedings, one to his sister Cry Widow (which produced a Champion Evil).
There was a time when Kingfish offered to lend Zukill to me (as a 3xW) for breeding, and can you believe I declined
Wish I had that to do over again

The reason is I had Stormbringer. I liked Stormbringer's style better: awesome head dog, brutal strength, absolute finisher as well (throat).
Stormy proved to be hit-and-miss as a producer, which was a big disappointment. He did throw a couple of awesome dogs though.
Cherry Coke (not Cola) was a world class bitch, and so was Stone Rose and her sister.
If I could have got Stormy bred to Bandana, and kept those pups to inbreed back to both parents, and if I would have been selective, there's no telling how many good dogs there would have been.

Stormy/Bandana over Ouch/Bandana
Stormy/Bandana over Stormy/Red Sonja
Stormy/Bandana over Stormy/Rosey
Stormy/Big Mama over Stormy/Ch Sally

etc.

But, alas, some bad luck ... and some poor management decisions ... never allowed those goals to be. I bred Stormbringer to 14 different bitches ... and none of them took ... he went sterile at 4-5 years old ... and I never had a chance to build a line on him. He threw some cold dogs, though, but he threw some game ass dogs as well as a couple MONSTER-powerful dogs ... and, if I would have had all those pups come to be, and would have been selective in my subsequent breeding choices, there would be a helluva legacy on the dog, I am sure.

But we'll never know ...

Jack