We ordered our Comp Cams High-Tech pushrods (part No. 7940-16) prior to getting our Edelbrock Performer LT1 heads. These are the stock 7.200-inch length in a 5/16-inch diameter. After receiving our heads, the directions recommended .100-inch longer pushrods (Comp 7949-16 according to the instructions). Due to time constraints, we used the 7940-16 pushrods anyway with no problems.