I think Testa would have gotten life in prison then acquitted in appeal for the McCullough murder like the others. However, the time he would be away would be enough for Scarfo to come to the top, so I think everything what had happened under Scarfo in real life would have happened anyway, just some time later.

Willie Marfeo to Henry Tameleo:

1) "You people want a loaf of bread and you throw the crumbs back. Well, fuck you. I ain't closing down."

2) "Get out of here, old man. Go tell Raymond to go shit in his hat. We're not giving you anything."