i really wouldn't think it would be viable. i mean for me more than anyone to be honest, forged zetec turbo with area six head/cams/vsprings, tubular manifold, etc.
as much as i'd love a FRS, money would have to come my way for one as there is a ridiculous amount of cash (even broken) in the xr2.
but if you want one of the fastest mk2 fiesta's in the country.....