can i run spacers on strut tops ?
 

After market flea bay strut bar needs very little to clear the alt.

I have the next smallest belt on 15315 instead of the one on it originally 15320

Either spacers or how much can I grind down on the top part of the alternator where the bolt that holds the alt together.

I don't need much but just enough to make the tallest part of the alternator slightly flatter

put some washers on the inner bolts. if that doesn't work, buy something that fits