[olddog]

As for the 385 series fitting in a Cobra, I recall reading quite a few threads on having to use a certain intake and / or milling a 1/4" or so off the carb flange, to get the hood to close with a drop base air cleaner. I know they are tight to fit in some manufactures, and I suspect it just may not fit at all in some others.

I rode in a new then (2005ish) Superformance with a 532 bought from Ford Racing. It fit.

I just looked at a Kirkham at the London show, with a V12 in it. The Valve cover said 800+ on it. I assume that was cubic inches. I talked to the ower's wife (let's say ultimately the true owner) for a bit. Every time she told me the manufacture's name someone would drop the hammer on a burnout. I gather the engine was some type of boat engine, and only a couple dozen or so were built. She said Kirkham special built the car around the engine. Now that was neat to see. I wish I had heard it run.