vortec heads
well here is my parts list for the 400HP 350 SB:Hydraulic lifters,Intake Manifold (Edelbrock Air gap Rpm range 1500-6500),HEI distributor,molly push rods one thousand over, forged piston flat tops 10.6 to 1, vortec roller rockers, molly valve locks, high performance bee hive springs and retainers, Intake and exhuast vavles (194), and either a speed demon 650 cfm or a street avenger 770 cfm, and an extreme energy camshaft 268H, vortec heads.
Now I was told these parts would give me 400 Hp let me know what you think. thanx JM.