YES! Edelbrock heads are cast and machined here in California! I know for sure because I visited their manufacturing plant before I signed up as a dealer with them. Edelbrock is now a part of Com/
ave bee wanting to buy "cheap" head for your 318. From what I have seen and witnessed aluminum heads do not make more power on stock engines. If I were you, I would do a clean-up of the ports and have a good valve job done by a race shop. You will be surprised. While you are working the heads see about a little more compression and perhaps a small cam that matches your torque converter (B&M)
