WTB- BBC Block & Heads

Hello
I am thinking about building a motor and need a block with 4.5 to 4.6 bore what do you got. Cast iron block
Dart, Brodix, GM, Merlin,ect.

Also im looking for Heads for a 496. so 312 or 325 cc head for a 4.310 bore block Please let me know what you got. Alum. Head Brodix,Dart, AFR, ect.

Call or txt 515-890-9111