[Keithc8]

Hoppy,
I have a couple of questions for you. You say a high rise intake, are we referring to the original 428CJ intake? If you are running 10.7 to 1 compression now with cast iron heads are you having any problems with detination or do you run better fuel.
If your heads have mild work done to them the Edelbrock stage 2 heads should pick you up between 40 to 50HP. You may have to do some tuning to the carburetor to maximize gains. I would also recommend running the rocker studs in the heads for the valvetrain. I was also wondering if you have the stock rocker system or aftermarket?
I feel that someone with above average mechanical skill could change the heads out with no real problems. I could answer any questions you might have when you did it. I would recheck rocker geometry when install new heads but should be very close. I would also like to know what piston is in your engine because of piston to valve issues. Sometimes we install a little larger valve than stock if piston will take it. Hope this helps a little. Thanks Keith Craft