It rather depends on whether the car rolling when cornering is annoying for you. My TR3 rolled rather more than I liked, so I added a front ARB. this improved the roll aspect, but made the understeer worse. I then added a rear ARB, & am very happy with the result. much less roll, & understeer, & if you find you need to tighten up on a bend just give more throttle, & the back comes round nicely. I know that for racing. traction is better with no ARB's, but for normal "spirited" driving my setup is great.
Bob