See the link below for information on these heads. I plan to place an order for a small production batch in early October. With the current foundry schedule, I should have castings by Thanksgiving, they should be machined by mid-December, and then it will be off to my local shop for seats and guides; probably late January to mid-February for delivery.
Price will be $3400 per pair. These will be bare heads, and they will require a valve job and all the valvetrain gear to complete them. If you are certain you want a set, I will need a $1500 deposit to reserve a pair for you.
If delays occur and I am not able to deliver the heads within a year of receiving the deposit, I will return the deposit to any customers at their request.
If you don't want to provide a deposit (which I understand completely), you can just email or call with your contact info and I will let you know when I have a set ready. However, I will not guarantee that you will receive a set anytime soon; I will probably only make a few sets more than I have deposits for.
Any questions, feel free to email me at jayb@fepower.net, or call me at 952-428-9035.
https://fepower.net/simplemachinesforum/index.php?topic=11821.0