My 440 build and HP guess.

[PRH]

On Stealth heads......More performance oriented seat work and a basic bowl and SSR tweak can yield 20cfm gains(at accessible lifts) on the intake side.

 

[thesiren74]

I would have a competition valve job done first. There's a You Tube video by Weingartnerracing where he inspects some 440 Source heads. You should watch it. Some good info.

I've watched it several times and yeah eventually getting trickflow heads but these will do for now.

 

[roccodart440]

The cam is bigger for the 440 the one I listed in the first post,

View attachment 1716017661

This is a nice cam and is capable of knocking on 500hp inn a 440 with performer RPM heads.

 

[Rmoore]

I think you will be surprised with your numbers ! You get the tune right , you gonna be all over and around that 500 mark ! Hi 400’s !

 

[thesiren74]

Parts aren't looking good after further inspection. At this point might build a stroker or abandon the whole build together maybe notch the 413 pistons and put the roller cam in that who knows lol