500+ horse 440

I have a 78 440 I am wanting to build and try to get at least 500 horse out of it.
I would like a large cam with lots of lope( love that sound)
I am kind of on a budget of course so does any one have any component combo suggestions?

Cam?
Heads?
Pistons?
Intake?
Running a 727 trans with shift kit not sure if going with stall converter ?