Well we have a 406 (.030 over 400) in my sons Dart. Its a mild street car that has the 383 forged crank in it. Has RPM heads and 10.5 comp , MP .557 cam and 3.91 gears. 727 with Dynamic 9.5 converter. Runs the Performer RPM intake and 750 DP. Has CPPA headers and 3" exh. Its not lightened any and with his 180 in it the car weighs 3640 lbs. Its run 11.41 @ 117 in full street trim driven to the track. Its one of them we had it so we built it builds. Its not the greatest combo but it runs nice for what it is and is a nice driving car. Here he is at the track. Ron