The verb faire in Conditionnel Présent uses the same irregular stem as in Futur Simple: fer-
Have a look at these sentences:
Here's how to form the Conditionnel Présent of faire:
fer- + endings of Imparfait: -ais, -ais, -ait, -ions, -iez, -aient
The je form has the same pronunciation as in Futur Simple. Look for the context : I will do vs I would do!