HP 440 RATEING ... How much power will i have ?
Easily closer to 400, but why that intake choice. The Performer RPM is a much better intake IMO and I'd top her off with at least an 850 cfm and don't forget a good roller rocker kit from Crane or Hughes. But now the cork in the system are the iron heads which will either have to be ported or go with a set of 440 source or Edelbrock aluminums. Now you're over 500 HP.
Almost forgot, that's a low comp. 440 (8to1) that you've got so plan on new pistons anyway to get the compression to 10 - 10.5 to 1.
Terry