451, the ede victor head does look like the better deal for me. Who makes the best bang for the buck springs, rockers and shaft? The cam i am looking at is a solid roller cam 272/276 dur @.050, 620/620 lift with 1.5 and 661/661 lift with 1.6. I am thinking i want to use the 1.6 rockers. Is there a way to figure what the duration will be with the 1.6 rockers? Also because the vicktor head is taller will the extra hight be an issue in my 73 dart? Thanks for all the help yall are giving me...