With position with number one at top dead center with exhaust valve closed where should the other side be?

I'm assisting a friend who attempted timing chains and guide and tensioner replacement on the vehicle listed above. He disassembled it and rotated both cams because it did not look like they were in the right spot by the DOT which would be the 11:00 on the passenger side right and the 12:00 position on the driver side left it's a good thing the key way was at the 12:00 position when he done this or he wouldn't have been able to without possible damage. I need to know in order to help him how to put each side back in the position they need to be in in order to time it correctly I know the firing order is 13726548. Should I rotate the driver side right cam 1324 until it goes back to number 1 at top dead center and exhaust valve closed on the compression stroke and the driver side left 7658 until I go back to number 7 I know the crank keyway will need to be at the 12:00 position to do this.