From Bowen's site:
"Each conversion includes a complete action/trigger tune, over-travel stop and an extra-length firing pin conversion. Caliber designations are remarked where appropriate. Please specify caliber and barrel length, where applicable. Various options, such as rear sights, shortened barrels, etc., are available. Please note: we recommend that the .475 Linebaugh be chambered only in the Super model Redhawk. Recoil is brutal in the standard model in this caliber.
Please note: We recommend the Super Redhawk (stainless .44 model only)
be used for .475 Linebaugh conversions due to heavy recoil."