Before you start flushing more money down the toilet, if you don't possess the equipment and or skill to assess the engines configuration regarding compression, cam position/phase/timing along with ignition timing/curve and carb calibration, and running characteristics along with whatever driveline configuration you have,....spend the money and take the car to a shop that can determine a problem, if it exists


because if it's an improper cam phasing, or poor torque converter selection, improper timing, etc, etc, the list can be endless as to why the performance is poor....eliminate all the "gray" areas before heaping more $$$ on parts they may do nothing to help your condition

Mike