Ok im thinking about a head swap, want more power, do i have an option other than super expensive aftermarket heads? Is there a more economical option i dont care if they are aluminum i could deal with cast iron heads i want the most out of my 302, im debating on a 331 bottom end in the near future also

Poor machining and real JUNK for parts. There's a reason they are so cheap, you get what you pay for.