Smart folks on here have pointed out the following:
1, Multiple Carbs are mostly eye candy.
2, With too large a venturi the airspeed needed to run the low speed circuit will suffer.
3, Low speed circuit will go lean, and changes to fix that will eat fuel.
3, Normal drivability will suffer.
4, Two small carbs might suffer less.
5, Balancing multiple carbs is a PITA (translation available in lots of places).
6, None of the above applies to modified engines.
7, You might want to do this any way.
8, All of the above applies to both 2 and 4 barrel carbs except the "balance" thing. And you can still get that messed up with any 2 or 4 barrel carb.
9, Did I mention that you might want to do this any way?
In the good old days, Hot rodders had limited choices, and what they did involved more compromise than most of us still around care to remember. You can get more power from these Inline 6 engines. Not, however as much as a SBC. Keep in mind that a stock 350 in 1971 was rated at...165 HP. Our 235 was rated at close to 140 or a bit less. Now to me that sounds pretty good. 100+ cubic inches equals 25 HP? Now my 6 sounds better, and better. To get close to say 165 HP, call Clifford, and Speedway. They will help you spend some money. I did say you might want to do this anyway? I am thinking about the 2 carb idea my self. And still have not decided which carbs to run. There are folks that know and some are on this site. I think (warning, opinion ahead) that 2 smaller carbs, with a cam and new lifters and a small runner intake (like Offenhauser) might give me a drivable truck with a modest improvement in HP. And I like the look, a lot. How much money will this cost me? 600-800 dollars. And that is just the big parts. Little stuff will I expect add up to another 200 dollars...might be why it is still in the idea stage. But 160 HP and a great look...well that is why I am still thinking and planning. Welcome to the club of unfilled expectations. Enjoy.
