Neither of your links are what you want if you want to just replace one harness. Your 69 has five basic harnesses:
Dash harness - main harness under dash, has instrument panel, heater control, steering column connector, includes fuse box and the bulkhead connector for the front lighting and engine harnesses, plus connector for front-to-back harness.
Front lighting harness - this the the driver side connector to the fuse box bulkhead, and contains the main power lead to the fuse box, front lighting wires, brake warning light, water temp sensor lead, and horns
Engine harness - this the passenger side half of the connector to the fuse box bulkhead, and contains ignition power, oil pressure sensor lead, idle speed solenoid (if so equipped), starter lead, etc.
Front-to-rear harness - bundle of wires connecting the main dash harness to the rear lighting harness; I believe the dome light for coupes comes off this harness (my 1st gens don't have a roof...)
Rear lighting harness - stop and turn lights, reverse lamps, sidemarkers, fuel tank sending unit, license plate lamp.
If you want to replace just one of the above, you need an OE replacement style, either American Autowire Factory Fit ( http://www.americanautowire.com/Fact...Harnesses.html
) or M&H ( www.wiringharness.com
If you want to replace them all and want one kit, the AAW Classic Update is the way to go; the kits you linked are better for street rods or for vehicles for which a specific fit Classic Update kit is not available.