High 12s should be a walk in the park for a 428. My old 400 did that with Comp's HR288(236/242, .520/.540). 750 Holley, Torker 2, unported #16s, 9.5 to 1, ram air manifolds, 3500 stall, and 3.23s. Very good street engine.
__________________
Chris D
69 GTO Liberty Blue/dark blue 467, 850 Holley, T2, Edelbrock Dport 310cfm w Ram Air manifolds, HFT 245/251D .561/.594L, T400, 9" w 3.50s 3905lbs 11.59@ 114, 1.57/ 60'
|