[Zderf]

I was able to determine the manufacturer of the adapter, TD Performance Products (Transdapt), and chatted with them about gaskets. Oddly, they said they do not have a gasket for that adapter. Ummm

I went to Jim Greens Performance in Lynnwood (the Ford Motor Specialists in Seattle, having a 427 SOC twin turbo sitting in the front room awaiting Mr. Green's next project) and they said I can use the stock Ford gasket after some trimming.

Trimming is a key word, as well as some Dremmel work on the adapter as the oil out port on the block intersects with a land on the adapter. Geeze... and this adapter is made specifically for 352, 390, 406 FE Nice job folks.

Thanks to all for your helpful feedback.

Respectfully,

Zderf