[Rusty67]

For anyone that is wondering, where the hell do I put an aftermarket coolant temp sensor into my block? Well here is the answer. Well, at least one of the answers. There is a plug in there from the factory that has an Allen head swedged into it. Fair warning, you are going to take a bath in coolant when you pull this plug. Even in you drain the radiator, even if you put it on a cherry picker and tip the motor to drain everything out the lower radiator return, it doesn't matter. There is still more coolant in there. If you are going to use this spot for your aftermarket temp sensor, bring a bucket!