Thanks. Well, I haven't fiddled with them yet to adjust the idle screws or anything, I just bolted them on and that was it. I think I am going to play with the idle jets and progressive linkage this weekend to try to get them more dialed in. As it is, I have to say the single 4 just felt better, and probably got better milage, simply because the carb fed fuel/air correctly into the dual plane manifold. With this setup both carbs are dumping fuel into a common chamber, with the primary carb dumping most of it at the back of the adapter. I think that may tend to be the cause of some little flat spots I am experiencing when accelerating.

I resisted changing anything on the car for the past year because it just ran so darned good with the 4 barrel setup.........powerwise as well as fuel economy. But I like the looks of the two carbs and scoops much better and most people who see them agree. I know adapter type setups are maybe a little "gimmicky" and not a true multicarb setup, but it does give a certain funkiness and oldtimey look to the engine now. It is also a nice view from the drivers seat going down the road and you can hear air sucking down the throats.

So, I guess I made a little trade off, and haven't really driven it enough to tell if milage is worse or better, but I'm betting it is worse due to the design.

Don