with the right parts fitted to compliment the ecu you will see some good gains 5efhe camshafts 4-2-1 exhaust manifold (obx make one) lightened flywheel the six speed box ratios also compliment the na engines quite nicely. a nice airbox system bmc cda for example. also remove any unessercary weight. also see if you can get a acis manifold and 5efhe ecu then remap that ecu with a piggy back