Mike, you can get new cylinder heads, but they're not cheap. I had to replace the one on my 2nd gen convertible, 2009, cam journals were knackered. I went new because my head was no good for a core, which meant paying around $1,800 for a reman. AMC in Spain is the manufacturer, various outlets can source them. I got mine here in the U.S. from ECS Tuning, https://www.ecstuning.com/ - They come complete, including vanos motor.