original ford mate.u cant get better IMHO,loads of my mates have used groupA headgaskets and they dont last long.christian majors 170mph rs turbo uses a standard ford headgasket and thats pushing 350bhp.
u must make sure its genuine ford tho mate.i bort one few years ago that was aparently genuine ford from local motor factors for 5quid!!!didnt bother with it.went to ford and paid 30quid for one