Yes you can determine it is not a head gasket by doing a leak down test. By process of elemination intake sounds logical.
Don't what to say about the stop leak. I'd rather shoot myself than believe that stuff works and lasts.
------------------
71' 3880# with me. Big Block 402, TH400, 3.73 posi,
13.1sec @ 105 MPH (poor 2.1 sixty foot and rookie tuning)
--will be racing at Chevellebration 2001!--
Picture of me roasting the tires and other guy stuff
Video of me staging (smoke of course)
Don't what to say about the stop leak. I'd rather shoot myself than believe that stuff works and lasts.
------------------
71' 3880# with me. Big Block 402, TH400, 3.73 posi,
13.1sec @ 105 MPH (poor 2.1 sixty foot and rookie tuning)
--will be racing at Chevellebration 2001!--
Picture of me roasting the tires and other guy stuff
Video of me staging (smoke of course)