Aluminum Heads

1. What aluminum heads (if any) are small ports like the 273/318?

2. Are they bare heads or complete with guides and valves?

3. If complete with valves, what size are the valves?

4. Are the ready to run or if complete, should they should be gone through anyway.

5. If you’ve used such a head, would you recommend them for basically a stock 318 build - upgraded pistons, cam from someone such as Racer Brown (and others)

Thanks for any inputs. Black Friday is rapidly approaching and if possible, I’d like to take advantage of any savings!