Never thought of that what is the spec and where did you find it? I knew there are coil specs but never ran across that one. Then again I never really looked.
FSM just tells you to use their tester. I have a Peterson's Big Book of Auto Repair -1977 Edition. Says remove the plug from the controller and check from position 4 to 5 of the plug. Should be 350 to 550 ohms.