What does that thing weigh?I would just spend the money and find you a better top end,cam,etc..mine runs 5.60's at 3100 pounds on Q-16..on mild tune..and 90 degree weather.but your talking pro stock top end with a highly modified 420 manifold.Your car runs real close to what my old 410 inch motor ran with old 16 degree heads,the best it would run was 9.20 with c-25..keep plugging away at it..

I could set you up with a good motor??