it goes on the back of the block, u have to crawl under neath the car and fish ur arms up between the block and the firewall and all the other shit, i'm not positive what was there b4 i had my first gauge installed by a garage so when i put my autometer one in i just followed their wire and replaced the unit someone else may kno if its just a screwplug in the block or not but atleast i told now u kno where to start lookin!
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