Do you need more than two outlets on your thermostat housing? In your first post you said you were going to ditch the smog stuff. Is a 1974 now exempt from smog tests in Calif? If that is the case, you can use one hole for the temp sender and the other for the intake manifold heat passage. How many outlets are on the thermostat housing in the car now?
I still can't see the hole in the valve cover. The thing is so clean and shiny my eyes are blinded. Are you going to use a breather in place of the oil fill cap or do you have another plan for the fresh air into the PCV system?
