These valve covers are now in process. I am hoping to have prototypes by the end of April, with the production parts available sometime in June. So far I have not finalized the filler cap situation, but am planning for a screw-in style. Anyone who is interested in a set of these can get on my list by emailing me at jayb@fepower.net, posting under this thread, or calling me at 952-428-9035. No deposit required, and if you have to decline delivery when the time comes, that's OK, but please don't say you'd like a pair if you are not serious. I will ship off the list on a first come, first served basis. Pricing for the valve covers, plain without the screw-in plugs or breathers, will be $259 per pair plus shipping, including attachment hardware.
The valve covers are pentroof style with a fine sand-cast finish. I expect to have multiple variations of these valve covers available as machining options. For example, plain cast, each cover machined for one breather, each cover machined for two breathers, fins on the top, top cut off with a plexiglass cover so that the valve train is visible, cut for master cylinder clearance, etc. etc. These valve covers will fit the Dove end stands without any modification. Also custom scripts machined into the top of the valve cover will also be available for additional cost of $50-$100 per pair, depending on the complexity of the design and the CNC time.
First production run will be 50 pairs of valve covers, with a follow-up production run of another 50 pair. After that, depending on if they sell, I may continue to build them, or I may discontinue them. Some pictures of a 3D printed model of the valve cover are shown below; the third picture shows a cover with the top machined off, that could be fitted with a plexiglass top. I will post pictures of the prototypes as soon as I have them. More information is available on page 8 of the forum thread listed below. Thanks for your interest in these parts - Jay
http://fepower.net/simplemachinesforum/index.php?topic=4481.0