My son and I both use the .557 Mopar cam in our cars. My buddy gave me mine and my brother gave us the one in my boys Dart which is a stock stroke .030 over 400. I shift at 6200 with my 906 headed 440 as it pulls nice up to that and I trap about 6400. I use 4.30's with a 30" tire. My son has Eddy heads on his 400 and he shifts at 6700 and traps about 6800 as he could use more gear (3.91's with a 26" tire) but it is a street car so we wont change the gears. His Dart weighs about 3550 with him in the car and my 63 goes just over 3700 with me in it. Both cars have run 11.40's. It is a nice street/strip cam for a mild build. Ron