Do a 408.The cool thing about a 408 over a 360,you will not give it enough intake port.You will NEED worked heads.Look for 265 to
[email protected] on the intake port.Run a flat tappet solid,if on a budget .Split pattern about 255 to 260 @ .050.Run a tight 3000 to 3500 converter,and 3.55 or 3.91s.Put you right at the high 10s to low 11s mark.