I really can't find any good info as stated above. I have searched high and low and can only find people offering to mod the engine for you. I have seen many pictures of port work and crank work but I don't think it is any good if you don't know why and what you should do and what is stage one and so on,,Is there any videos or books or websites that take you through the whole process from stage one mod to lowend mods high end mods and what you need to get started. IF not someone should make one and sell it to me!