We have a 3 cyl Cosra for which we have been supplied a succestion of 3 recon heads complete with camshafts. The heads have all come with the same camshafts i;e all the lobes face the same way. This appears to us to be wrong as the exhaust valves are opening just after the inlet valves due to the rockers being on opposite sides of the cams. Does anybody know any difference? Should the cams be the same?