Denso is a good brand, they are the only spark plugs I use and wouldnt have a problem with using their o2 sensors.

If you go with splicing in the old connectors I would suggest soldering the splices and covering with heat shrink tubing, you can get it at radio shack pretty cheap (remember to slide the tubing on the wire BEFORE soldering together). That would give you the best connection and least corrosion worries. Also make sure you dont get wires swapped around.

--Dave

1999 Rodeo LS 3.2 4x4 5 Speed
32x11.50-15 BFG T/A KO on US Wheel 94 series
3" Lift - Rancho 9000x
Rear No-Slip Locker
Flowmaster 50 series SUV 2.25"

There is a very fine line between "hobby" and "mental illness." - Dave Barry