What are you going to do with the truck once it's together? Just driving on weekends, the intake you have will be just fine. Clifford intakes are designed for a higher rpm, they always have been. 25 years ago, if you wanted a street intake, most choose the Offenhauser intakes because the runners were smaller which kept the air velocity higher, which makes for a better throttle response.
The cylinder head design on the 235 is what determines performance. Without a lot of cutting and grinding, it really doesn't matter what intake you put on. The advantage of a dual carburetor intake is the distribution of the fuel mixture, not the amount. With two smaller carburetors spread apart, all the cylinders receive equal mixture. The single carb intakes tend to lean out the outer cylinders some. A single two barrel will not change the facts, the outer cylinders will still be slightly leaner.
The 216 may have smaller runners, and a smaller carburetor, but if it works and that's all you have, run it and keep your eye out for the correct factory intake down the road. You won't gain anything but a lighter bank account going aftermarket.
That would be a magic intake if it can raise vacuum !
