Edelbrock RPM Heads

Nice! I did a set like this a few years ago, and it was a TON of work. But a mild cammed 505 made 650/650 with them and has many thousands of miles on it now. We ended up with 343/273 at .700", I think that just about maxes out these heads, and you HAVE to go with the bigger intake valve to get it. We used a 2.19" If I were to do it again, I think I would try the 2.25"/1.78" valve package.