Slant 6 Valve cover gasket.?????

2 different valve cover gaskets 60-80 and 81-87. The 60-80 has a 90 degree corner at the right front and the 81-87 has what I will call a inset corner in the same location also be aware that all slant six heads will fit all slant six blocks given the correct valve gear also the valve covers are different. And at this point in time who knows what is on your engine.