Should I Perform Chin Ups With a Suvenated Grip?

Is it ok to perform chin ups with a neutral wrist, meaning hands and wrists facing each other? What's fine with me? I have a pull up attachment that goes over my in rack. Pull up bar elows frne old wrist. Is this ok? Or should i stop being a pussy and chin with a souvenate grip? Well, if you do a either pull up or a partially suvenated grip, like a parallel grip, chin up a, you're really leaving out the biceps. And most people want to train their biceps somehow, and the chin's a good to do it.