comp 20-249-4, 306/306 260/260 .555"/.555" in at 107*. blueprinted to 11.5:1 with quench. 4.56 rear gear and 28" tire. 1.75" headers and 2.5" dual exhaust. 195 cranking psi, AVS carb, exhaust crossover blocked ld340. will ping for a second at low rpms until the revs come up if I am in too low of a trans gear, no vacuum advance
