FWIW, the OEM cast steel cranks are good to 600 hp +/-. If you are boosting or nitrous, then go forged. If not, and you're not going to go wild with the engine - I wouldn't think twice about staying cast. The original powdered metal rods are not too shabby either, but I can more easily justify forged pieces for the rods and pistons than I could the crank.
Eagle and Scat cast stuff is trash. Their forged stuff is good. Not as good as Callies, but still really good for the $. Cams: Comp and Bullet. Comp will do anything you want on a billet core for $400. Second vote for DSS pistons. Also, Diamond, Mahle, JE, Speed Pro - in other words, all the normal top-shelf brands.
Heads: AFR makes some good heads but their QC has slipped. I had a set of AFR heads and every single bolt hole was too shallow by 1/4". THAT pissed me off. I have TrickFlows on there now and they're great. Lloyd Elliot is the LT1 porting master and he'll give you a killer package with heads and custom cam.