Well mate. The 321 bf will bolt on to the std vv but you will need to buy some of that gasket card and cut out a new gasket or gasket paste. the throttle linkage is just one of one on (just dont lose any of the parts). How ever you may need to make a few bits for the choke. But that was on a fiesta you may not have to on a escort.

All in all. It's been fun to do on the fiesta.

I've spent all day finly tuning mine and it sounds a lot better than the old vv.