i had to replace my cylinder heads on my 87 Camaro with the 5.7l. i picked up a set of Edelbrock performer rpms for a great price. my problem is that i do not know what sensor to get to make the gauge work properly because the heads have a 1/2 NPT thread. and the sensor that came in the car originally is 3/8 NPT i have an adapter in right now but there is no coolant flow to the sensor so this will not work.
thanks