I use the Holley Street Dominator on the 440 in my 63 and I am very pleased with it. You can see it's not that high and I have a 1" spacer on it. My son runs the RPM on the 400 in his Dart and it works very good also on street/strip cars. He runs Eddy heads to my 906's and he is about 150 lbs lighter then my 63. But it's kinda funny as my 63 has better 60 ft's then his Dart with my best of 1.57 to his 1.60. But he has pulled a tad more mph then me. You would think it would be the other way. But I do run more gear them and he runs a shorter tire then me. I would not hesitate to use the SD on your setup. Ron