I found this intake manifold after having misplaced it for many years.
A little background first, it was custom made by Dave Cooley (used to work for C & R Small Cars) in 1984. The intent was to have them mass produced and sold in the US and European markets. So after some preliminary testing in the US, the intake and carburetor (I bought the 390 cfm Holley 4-bbl and the air filter) were shipped to Stefan Lukas at Parsget in Germany. He installed the setup onto an Opel GT, and proceeded to try to achieve TUV approval. Unfortunately, the intake/carb combination did not pass due to increased emissions levels over stock (Germany was really just then getting 'green' when it came to these issues). However the ironic thing it that nobody ever changed the jetting from stock! So it possibly would have passed with some fine tuning.
Anyway, 9 months later the intake came back to the US, and it was then put on a shelf by Dave. My intent was to get a mass-produced intake for 'free' by supplying the carb and air filter (per a deal I struck with Smitty, one of C & R's owners). However without the European market to sell to, the intake was never mass produced, and I was essentially 'SOL'. Years later, after Dave had been out of Opels for some time, I contacted him looking for my Holley carb and air filter, and asked him if he wanted to sell the intake. We arrived at a number and struck a deal, and it was mine.
Fast forward many years later, and I ended up putting the intake on my flow bench and finding some flow issues with it (mostly distribution). So I proceeded to correct these issues, and then again put it on a shelf. At which point I forgot which shelf exactly, and which box!
So fortunately I recently 're-found' my intake, and took a few pics for posterity and historical reasons. So here it is: