Great read, and info. guys....I searched out this post to query the experts here on my own situation. Currently running an iron 286 max wedge head, lightly rubbed on, and cast mw crossram, which I'm not changing. It's a period correct thing. The EZ-1 not only saves weight, but exhaust port location also allows me to keep the stainless headers that I prefer to only purchase once. I'm not rich, but am also not averse to buying the 325 EZ-1's, rockers, and/or investing in port/machine work to pick up some et. Current package is 511, @3700#, best 10.30@131, 1.31 60 on a 9" tire. Appreciate any input. Thanks.