[cyclone427428]

I just rebuilt my 1970 360FE. I put in new bearings of course, rings, clevite stock cam, lifters and pushrods, I got it running without any problems but when I go to drive it it has no power. I put an Offenhauser port o sonic single plane intake on it and a holley 600 cfm mechanical secondary carb. All of the spark plug wires are where they need to be. im runing a rebuilt distributor with the ignitor setup along with a 40,000 colt accel coil. My brother says its becuase of the intake but I cant see how that can be becuase when I get it up to the rpm range when the intake makes power it still acts the same. Anyone have any ideas?