In most all cases the answer is no. The billet baskets are taller and cut differently than the slider basket and do not work. The exception to this is the KZ900/1000, the MTC basket for this application is the same whether for a lockup, slider, or Gen II. We usually suggest you try to sell the heavy basket to help offset some of the cost of a Gen II and send us a stock core to utilize. If necessary we will unmount your gear from the heavy duty basket and install that gear on our slider basket. We will return your unassembled heavy duty basket to you with your order.