With a COLD engine have someone start it and run you hand around the area you suspect and you should feel the pressure of the escaping exhaust. You may only have a minute or so to do it so be ready when you fire it up. If nothing up top put the car on jack stands and repeat. If it is headers with 1/4 flanges then you need gaskets at the heads and at the collectors and then retest.


Careful, your character's showing!