My only input would be to NOT cut corners if your trying to build H.P. If it takes a little longer to build it right ........... wait until you can afford it. If you save a few bux on the parts only to have it blow up, you will be deeper in debt then if you just do it right the first time. If you plan to build a 500 H.P. engine make sure ALL the parts you buy will handle in excess of 500 h.p. Just my opinion.