im going to have to disagree with this. with the v8 in longitudinal configuration, more of the weight is placed aft of the front axle than with a FWD engine and transaxle. the v8 is heavier, no doubt, but the part of it thats in front of the axle is probably not much (if any) heavier. combined with the fact that im sure some components have to be relocated (ie. battery) to make room for the v8...plus a heavy live axle being placed in the rear....im willing to bet the weight balance on a RWD conversion is considerably better than a stock focus. the focus also has a slightly longer wheelbase than a mustang a RWD focus would be no track star...but im willing to bet it would handle pretty decently if you spent a little time tweaking the suspension after the swap.