You sure about that?  IIRC, at least on mine, I *thought* that the bolt hole in the head for the stud is coarse thread, and you use that itched stud for the regular valve covers.  If you had the t-bird dress up covers you had to get different studs that were coarse on one end (to go into the head) and fine pitch on the other for the dress-up nuts specific to those covers? Is my recollection wrong on that?  cars still tucked in for the winter else id go check!

Ron Grove

Wauconda, IL

5/16”-18 X 5/16”-24 X 3.86”

For the aluminum T-Bird covers the dimensions are:

5/16”-18 X 5/16”-24 X 4.125”

Coarse thread at the heads and fine threads for the valve cover nuts.

Lorena, Texas (South of Waco)

Here’s an ebay link to some cast wing nuts you can drill and tap for what ever size you’d like.  Pricing is not all that bad either.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=260478022961&viewitem

Lorena, Texas (South of Waco)

For those of you still looking, I bought some from both sources. The link I noted in an earlier post (with picture) cost me $40 shipped for 2 bags of 4, Eelco brand packaging.

I contacted the seller in Ted's link above and got a bulk pack of 8 for $16/shipped. The Ebay seller that Ted listed sells the rough casting, and it isn't tapped for threads, but has a 1/4" hole if I recall correctly. That would be best for a Y-block fella's purpose.

Todd in Central California...about half way between Fresno and Sacramento

1956 Thunderbird - 1960 F-100 - 1961 Starliner - 1961 Imperial