Here is another link for the 904 and 988.
http://www.triumphperformanceusa.com/?main_page=index&cPath=10 Higher compression ration for the cylinders. Cylinders come bored out for you and Nikasil plated. If you go with the stroker kit, the crank is supplied complete with Carillo rods for a reasonable price. If I ever go this route, I would consider this site. Looks impressive.