Opinions: Cam Swap or not
You can not reuse the lifters from one Hyd. or Mech. cam to another and I would suggest getting new springs for the new cam. Have a shop do the work on the heads/springs.
Use the split duration cam. The Comp 292 is a good mid/entry level race cam. The split duration is more street freindly covering a wider RPM range. A slight drop in duration will add desired torque with minor at best hp drop.