[jarhead]

Before you order the pushrods determine what length you need. Comp Cam doesn't differentiate between early and late head geometry. The pushrod length they include in their kits may work fine for 400 and maybe even late 389 but the ones they included in a complete kit that I bought ended up being 1/2 inch too long. This caused extreme wear on the valve guides and beat the heck out of the top of the spring retainers. The length should have been 8.6 - 8.7 instead of the 9.1's in the kit. Measure before you buy. The roller tip should run across the tip of the valve during full travel.