The heads I will be using for my 5.0HO (from an 87 GT) are older but were apparently a decent head in their day. Better than stock anyway (plus they were free from a friend ). Anyway does anyone know anything about them besides what I have found here? I have heard that they need special headers but cannot confirm that. Found one post that said they would take stock headers so I'm kinda confused and not sure how to find out for sure. Thought I'd try the forum. The heads are aluminum Ford Racing M-6049-J302. Here's one bit of info I found on another board... 30 hp increase by just swapping from the E7 head 50-60 hp increase by swapping heads and intake 100-110 hp increase by swapping heads, intake, headers and proper cam 1.94 intake and 1.60 exhaust valves (2.02 intake/1.60 on K302) drilled and tapped for screw in rocker arm studs accepts stock valve covers, intakes, and headers exhaust flange has dual bolt pattern for added room for porting combustion chambers are 58cc intake port is 170cc exhaust port is 60cc uses Motorcraft AG series spark plugs My questions are: Does anyone know anything about header selection/fitment? Any other info you may have would be helpful.