I don't know about the price differences, but I thought the painless harnesses were a do-it-yourself kit, where the customer has to cut the wires to final length and attach the connectors. I am not positive on this.
If you are restoring the car to stock (relatively), I think the replacement harnesses are very easy, especially for a non-pro. All the wires and connectors should be correct, and in the correct location, already attached, and taped as original. Just unplug the old harness and plug in the new. A factory wiring diagram might be helpful.
I think the painless would be more work, but nicer if you are modifying a lot of circuits...
Someone please correct me if I am wrong, but I don't think painless makes a complete, direct replacement, plug-in for early Chevelles.
"Once you go RAT, you never go back..."
1966 SS L78 coupe
1966 SS convertible
1965 Impala convertible
1 wife that has drawn the line...
A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!