Not a big clifford fan since 2001, but these headers fit very well, have a 3/8 flange, they are fully welded on the the face side and tacked on the outside, I had mine fully welded on the outside and then sent off to be ceramic coated, the engine bay in the bronco is known to be very warm, so my hood scoop has a 14 inch cooling fan under it to draw air out of the engine bay and not for hood clearance.