I`m building a 383 for street use only. I want all low end torque and I want it to really thump. This is the plan so far. 3800# car, 3:73 gears, 700R4 trans and 2800 stall. 383 c.i. w/ 5.7 rods, E-tek 170 alum. heads w/ 1.60 - 2.02 valves, air gap intake and race deamon 650. Cam to be hyd. roller w/ 228@50, 525 lift ( w/ 1.6 roller rockers ) and 106 cl. 1 5/8" headers into 2 1/2" flowmasters w/ crossover. As a street toy, I want the thump for sound effects and from the light, when the loud pedal goes down, I want everyone way back in their seats. I was told that the 170 heads and the 650 is best for low end as well as the duration on the cam. I hope the 106 cl will give me the thump. What do ya think?