[camerjeff]

Jack, I ran one in the late 80’s and did not have good luck with it. The same engine in the same car slowed down 2 tenths and 3 mph in the 1/4 mile. As an added bonus my Street mpg dropped by a third! This was in a 67 Lemans, mostly stock 230 with a turbo 350 automatic and 3.55 gears.

Thinking it over I believe the balance passages between the runners was to small, and I was running mercury marine’s version of the 2 GC carbs. They are pretty as they are aluminum bodied. The set up looked good, but hood clearance was an issue on the front aircleaner. I had to sacrifice a solid flat hood and ran a wide hood scoop to cover the offset and very forward hole needed in the hood.
I also think I needed to deactivate the enrichment valves in the carbs, didn’t think about it until after I sold the complete set up around 25 years ago.
It was an attempt to get that Lemans with a full interior into the high 13’s. It failed, but I think with some work it would make a good manifold. But I wasn’t willing to do it. I have some ads that came with the manifold when I found it in a now long closed Detroit speed shop.