Hi bobco,
Here is the story.
I have a box full of special heads for the NE motor [I am sure the largest collection in America]. Almost all of them cost me over $200.00 each.
Because the NE motor can be modified to easily travel above 45 MPH, most don't need the better head.
Speed cost money, how fast do you want to go?
I remember as a teenager, that my '55 chevy would go really fast from all the modifications I did to the motor, but I also remember reaching a certain level, and to go a little faster cost a lot of money. This is also true with the NE motor, a small investment could take it to a certain level, but to go the extra mile costs a lot.
I doubt you will find a quality head for less than $200.00, because there isn't a large market, and the optional heads are all custom made in small quantities. I have tried many times to find someone to produce the head for under $100.00, but didn't succeed.
Everytime I have special heads made it must be in quanities of at least 3, and right now I don't know of 3 owners looking for them, and I sure don't need more in my collection.
If you want to try to cast your own, I will happily supply the needed information on combustion chamber design.
I have test heads with over 165 pounds of compression. I still have the first WC-1 head I had welded and re-worked to fit the NE motor [cheapest version of a performance head]. I have heads that were completely welded shut and a new pattern carved out, but the welding was less than stellar. I might possible let a few of them go, but would at least need my original cost to do so. I do not weld and had to pay local welders [ouch] to make the requested changes on each head. In my area if a welder even looks at anything aluminum the minimum charge was $65.00. As you can see speed costs.
If you want to contact me I will itemize my cost & supply pictures of any heads that would be of interest to you. Please understand that many were prototype heads and although work well, are what I consider "crude".
Have fun,