I was talking to a fellow today and he told me he had a set of heads for sale, he said they were Kenny Weld cnc'ed Edelbrock castings. He had bought them used, and was going to use them on a sprint car (410ci) and he never ended up using them. Then he tells me they have T&D rockers, and the Hillborn injection goes with also. These are fairly older heads late 90's early 2000's. What would this setup be worth in good shape? As far as the heads go would they be fine for a 500-600hp sbc build. I really know nothing more about them. I'm just looking for some info I guess? Everything I read about weld-tech seems to be very good just wondering if I should spend my money on something newer?