Length is 64 inches long.
No. Different generations of S10 altogether.
The rear bumper of a 98 Chevy S10 can be removed by disconnecting the rear wiring harness and taking out the retaining bolts. The bumper can then be removed from the frame and pulled from the vehicle.
I don't know what you mean by "W" S10, but the bumper will fit all second generation chevy S10s. The second generations production ran from 1994-2004.
A complete wiring diagram from bumper two bumper
Yes.
Bumper to Bumper
you will need the wire harness and radiator core support
Yes
Yes
190.2 inches bumper to bumper.
Bumper to bumper, 16' 6.1" (198.1")
15.5 feet 1996-00