hi, want more power!!
take the standard zetec 16 se, chip it, a new induction air filtration system, kn!
have a power run on the rolling road, get ignition results and suggestions.
Motoscope northallerton are always helpful or somewhere local to you with a rolling road.
then decide before spending on suspension/brakes etc, what youre aims are.
the above is a good exercise and learning curve.
The above costs £200,or thereabouts.and a chance to get to know how the vehicle handles, without performance parts.
it will give you options, ie; you might want to change/engines/vehicles.
A cheap way to begin.