Here's my comment (question) and their answer on the page for the distributor.
On 03/31/2015 you asked the following question at Advance Auto Parts
"Well This IS DIFFERENT! Looks like someone got off their DUFF and figured out the PLASTIC distributor base was not the best idea,(it only took them 20 years!) and made it of metal. OR AM I SEEING THINGS. If it is metal, I'll buy one. If not I'll get the United Electronics unit from a competitor for less."
Heath, ASE Parts Specialist from AAP said:
"I'm glad to assist, Torskdoc! This ToughOne New Ignition Distributor with Cap and Rotor (Part No. T1639) does have a metal base. This distributor will provide many miles of reliable service on your 2002 Chevrolet S10 4.3L V6"
PART is TOUGHONE T-1639. It comes with the module, cap and rotor. Brand New, no core, and $111.99. This compares pretty well with the United @ Rockauto for $91. & shipping.