I have yet to see an ST24 run a true 220bhp. If it was that easy to get the power out of them why did Ford stop at the 202 in the ST200.
I would want to see proof of the power before believing what some people say. Trust me, I have a heavily modified ST200 and know how difficult it is to get real power gains out of these engines. Mine is runnign atrue 243bhp and cost a small fortune to get there!