Wanted...302 casting heads..
Found mine on CL. I called and visited all the adverts I'd see for parting out 318's or 318 for sale until I finally found a set. The guy wanted $100 for the complete motor, I offered him $50 for the heads & headers. It worked out, heads checked out fine & resold the headers. It did take an entire summer to find them though, but they are still out there.