I would just boost the motor you have. The 2000 cars have proven very reliable when done right. Take advantage of the good low mileage motor you have now plus save you some hassle(don't kid yourself). You will make plenty of usable power.
'99 Silver svt
For sale
19" Axis Neo wheels
3.0 parts, pre-98 trunk,
Check classifieds
bp.powell@comcast.net