in a word, 'no'

The block is different, the escort being rwd mounts on the sides of the block, the fiesta mounts on a cradle and beside the thermostat housing.

When you do eventually find a fiesta xr2 xflow, you will need the xr2 crossmember and driveshafts also as the 1.6 711m xflow is about an inch longer than the 0.9/1.1 Valencia engine you have.