69,

If you have a 360, it would have originally come with a autolite/motorcraft 2100 2 barrel carb. It would have had 2 idle mixture screws. Of course, after 43 years, the original carb may have been swapped out for something different. Best to post a few pics, then it will be easier to identify. You should also make note of any numbers located on the metal tag which will tell us exactly what you have. This metal tag may also be missing...

Here's mine off my 72 360:

http://i694.photobucket.com/albums/v...g?t=1301157607

and

http://i694.photobucket.com/albums/v...g?t=1301158436

You can see the first one one the bottom left of the pic. The second one is hidden in the shadow, just below the accelerator pump cover.

The long pointed screws in the 2nd pic shows what the idle mixture screws look like. Note each one has a spring. The spring, under tension, keeps the screw from going out of adjustment.

Hope that helps,

John