Rochester Quadrajet base gasket choice...

[crazyboat1976]

Hi guys,

There's a long time ago I did not post something here. I hope you are all fine ;-)

I have a question regarding my Mercruiser 5.7L of 1986. I rebuild the complete carb and finaly I have two possibilities for the base gasket.

Here you have a picture of the plenum when I removed the carburetor from it. Only this gasket was present.

What is your experience with each configurtion of gasket on this engine and wich one do I have to place on mine?

many thanks, xavier