Will motor mounts hold up??

dont think there will be a problem my cheap chinese stock replacement spooltype mounts lasts for a while before they ripped appart but with some hevy duty polyuretane inserts that i think the schumaker motor mounts already has there is no problems at all and i dont even have any extra suport for the enine like alot of other people have, this is with a bad street340 and hoosier or mickey thompson tires hooking pretty hard on the street....