Box 'o Stuff purchased for an LT1 track car. All of these items were maintained as track spares and are probably good to have when going to the track, just in case.

All parts are new and in original packaging.

One AC Delco 180 Degree Thermostat, P/N 12555290. According to Gmpartsdirect.com, fits all LT1 f-bodies. Lists for $18.28 plus shipping.
Two AC Delco T56 Seal Assembly, P/N 10117848. This is the rubber piece that your stick the front of the driveshaft into. Lists at Gmpartsdirect.com $32.23 plus shipping EACH.
One AC Delco PCV Valve, P/N 25095452. Lists for $6.64 plus shipping at Gmpartsdirect.com
One AC Delco LT4 Knock Module, P/N 25095452. Lists for $68.06 plus shipping at Gmpartsdirect.com. (I don't claim to know the difference between the LT1 and the LT4 Knock Module)
One Timken T56 Rear Transmission Seal, Timken P/N 9613-S. Lists for $5.99 at autozone.com
Eight Bosch Platinum +4 Spark Plugs, P/N 4458. List for $5.99 each at autozone.com or $47.92 plus tax for all eight

The cost (excluding shipping and tax) of these items total $211.35

Note that I checked the Gmpartsdirect.com pricing, not the Chevy dealer pricing (which can be as a much as twice as much).

Unless there is a huge benefit I would prefer to sell as a "Box 'o Stuff" and not separate. I can take pictures if required.

Willing to sell all for $125 shipped to your door to anywhere in the lower 48 states.