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Sorry for the ramble...You can get good power, even more if tuned right from a tunnel ram, but they are mainly for racing. They can be hard to tune, I ran one for a while on a Camaro I had. Cold startup can be a bear sometimes, I use to prime the engine with some starter fuild to get things rolling. Tuning the carbs can be a real bear, too much carb really for a 350 street engine, but hey too much is better than not enough. The idle qualities are about the same, I always had plenty of vacuum once it got started. You just have to remember you have 2 of everything when tuning. I had a pretty bad off idle stumble and sometimes a backfire through the carb (lean) initially. It took quite a bit of tuning, had to change timing, idle mix, squiters and pump cams. It seemed to like having an automatic tranny behind it also...when I switched to manual it didn't run quite as good. I also ran the side mounted and the linkage looked cool but it made it hard to work on the back carb. Do yourself a favor and polish the manifold before you install it, they look alot better that way, I used clear engine paint to coat mine. One last thing if you run 6 cyl engine stands the clearance is very tight for air cleaner on that back carb.
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