Worked over 440 motor home engine hp question?

Doing a similar top end build on my `74 low comp .030 bore basically stock bottom end in good shape. Have a set of bare 440 Source heads at Hughes getting prep and milling should end up close to 10:1 w/ Felpro gaskets. Have Proparts headers, Eddy RPM intake, Holley 750 2x pumper, MSD, planning to go with a Comp Hydraulic K Kit thinking at least a 550 lift (?). Stock rockers. Realistically looking for 450 HP w/ tuning.....Opinions welcome and good luck Dusted U Bad.....