HP 440 RATEING ... How much power will i have ?

ok, so they are the flat top battleships... The bad news, you still have an 8:1 compression 440, and the rods are the heaviest made, and no stronger than std LYs. The up side, someone's been in there and you should have at least a solid set of bearing clearances. I maintain the smaller cam, and the MP single will hurt you, and the dual plane isnt anything other than stock. I'd run either a Holley Street Dominator, or an RPM.