Slow cuda 68 help plz

Like most others say, the major factors contributing to your poorer performance is the intake and cam combo on that little 318. Really, of all the things you've "upgraded" those two factors would have to have had the most influence. I would think your torque curve has dropped off over what you had originally. The Weiand intake is single plane, right? Better suited to a higher revving engine. As someone else suggested you'd do better with a Performer dual plane intake and a cam better suited to producing low end torque. I obtained excellent performance improvements on the 318 in my previous mopar using the performer and XE256. Good luck!