I bought these ignition wires on Ebay. The wires are junk. I checked the resistance on the wires & they were way off. 1 wire had no reading which ment a broken circuit. The heat shields are original and the wires are stamped Delco. The boots and wire terminals are not the same as original. Looks like they bought black bulk defective Delco wire and tried to copy the factory wires. The only good parts are the heat shields.
http://www.ebay.com/itm/NEW-AC-DELCO...e6a2a3&vxp=mtr

 

Get taylor or msd...

They actually might be delcos. My truck ones looked like that, but weren't blue wires.

 

The wires they sent were black. They show a blue wire in the description.
I guess they could be old surplus or defective wires that they bought in bulk from GM but definitely not Part 748RR. They came in a zip lock bag.

 

Thats bullshit, thanks for the info! I take it you were able to return w/o issue?

 

I got a full refund from Ebay. The supplier's return policy is to return the item at your expense & they will refund your money less 20%. After a few letters and a phone call to Ebay they refunded my money 100%. I tried to have the wire description and part # changed but Ebay still lets them sell as new Delco 748RR.