I have a 67 Plymouth Belvedere that is being prepped for paint. I want to cut a round hole in the hood for use with the 67 RO hood scoop. The problem is there is no engine in the car. I have a 68 Dodge Charger I could measure the location of the carb stud, but is the location of the carb stud the same relative to the firewall and inner fenders? I believe they are but I thought I would check with the experts first