[67Lemons]

I’m gathering parts for an upcoming 455 build with 7K3 heads & an 041 RAIV cam, haven’t decided on whose version of the 041 yet. I’ve seen this done a few ways but when starting from scratch what length Ferrea valves should I purchase? They show listings for RAIV valves as well as standard valves in different lengths? I think the springs most folks recommend are the Crower 405 for taller valves but the Crower catalog recommends the 404’s with their 60919 & finally I’m thinking of using chromemoly retainers so should I stick with stock or something else? The machine shop will be replacing the guides & cutting for Vinton seals then setting everything up including seat pressures & coil bind.