tune the "cruise" step with an LM1 (best) AF gauge & plug readings on fresh plug(s) & do that by going out on the interstate & pull over & sub in some new plugs & unhook the accel pump linkage & ease back on the road & go 10 miles & shut if off at speed/shift into neutral & coast to the side of the road & pull em & see how they look. Wallace racing has good plug reading pics. On the "power" step ET time slips or AF ratio gauge. On the springs hook a vacuum gauge to manifold vacuum & note idle vacuum and cruise vacuum range & I think you want the springs to come in no higher maybe 2" lower than idle vacuum. I'm rusty on some of this but this might get you started. I'm assuming you have a AFB strip kit or an eddy strip kit.