Our DOM steel frames are TIG-MIG welded. They will accept most Evolution®, Panhead and Shovelhead motors. Please let us know what engine you’d like to use so we can ensure correct fitment. Frames that include axle kits have a 3/4" axle unless noted. Frames with transmission mount feature our easy-to-use welded-on transmission plate for better strength and easy alignment. Call your MC Advantages Sales Rep for more fitment information.