Will a 6 speed fit in a 1984 shovelhead frame?

Yes, a 6-speed transmission can fit in a 1984 Shovelhead frame, but it may require some modifications. The stock frame may need to be altered to accommodate the larger dimensions of the 6-speed transmission. Additionally, you may need to consider the primary drive configuration and the necessary components to ensure proper alignment and fitment. Always consult a professional or experienced builder for specific installation guidance.