Rather dated update:
Standard Motor Products VA20 Vacuum Actuator $43.73 / ea.
I found these on Amazon and seem to be the correct spec. They have two screw holes for mounting but have a black plastic body. So if you're not building a concourse car, I thin these would be a good replacement to get...
Where is a good source for ram air actuators? I have hear of using the actuators off of the air cleaner intake snorkel, but I don’t want to buy one just for the actuator. I have one, but it doesn’t hold vacuum. I did a search but didn’t have much luck. TIA
Kevin