Yes the ones I got are not modified, My cam is still stock so the lift is not very big. The stock heads flow very well. The rocker arms are 1.5 ratio. I am using a davis unified ignition distribitor from perfomance distributors, they will curve it for you, just call them and tell them your combo. Also using flowtech headers with 2.5 inch pipes with warlock mufflers. Im runnnig a holley fuel pump going to a Edelbrock 1405 (600 cfm) carb. the engine is very strong for the street, I have not had it on the track, but the dyno does not lie 394 HP at 5152 rpm and 352 pounds of torque at , I think it was 4200 rpm or something around there.