I'd run a wire brush over it to get even more of the rust off. It looks a ton better though. 
Its aluminum, not gold!You did an awesome job there and Carl has a good point but may I ask why you decided to run the cast iron instead of looking for an aluminum intake? I've taken 390s apart alot and those intakes weigh about the same as a complete 4 cyl motor.

Dave, if you sold all your junk as scrap, you'd be able to just go buy a new truck.![]()
That is pretty cool. Touch up with a bead blaster and you're ready to paint it next year!
So, what does a Co-Op net you in a truck discount.
Do tell!