Which 440 Cam??

which flat top pistons
6 pack compression height pistons with 915 heads give much more compression
others have no quench and you have shot yourself in the foot
MP cams can work but are essentially obsolete
EDM lifters?
what lift will your springs handel
guides cut for viton seals
post up your compression calculations and cranking compression if you have it
makes a big difference in cam selection
stock valve sizes in those heads? any porting?
BTW with those headers you do not need near as much exhaust split as cams designed for stock manifolds
there are dino tests on the web from one of our members which you should read