440 duster. Need engine build advice

Ok. I believe I'm going a new route with this thing. New crank and pistons. Here's what I want. ....600 horse, light weight pistons, ly rods. Should i get floating wrist pins with Ross pistons or pressed? What is the best way to go about this? I want to keep the iron heads and now I'm tearing the block down and cleaning the burs off. I have a 557 purple solid lifter. I also have a set of 6 pack rods. Do I implement those? I guess the ly are good for 600 ponies. But will the heads handle that? I cleaned up these heads and I think they will flow decent. The m1 is getting modified as well. The demon 850 is a vacuum secondary carb. Do I change it to a double pump or replace the carb? If anyone in Wisconsin wants to loan me a hand feel free. I always have cold beer. Please FABO veterans help me create a street bruiser! Thank you guys. -Billy.