I have two '76 280z engines, one with 100,00+ miles, one with 50,000. i am planning on keeping the 50,000 for my project car, and i took the 100,000 miler to my auto class to clean up/potentially repair, etc. Well, we cracked it open and it is a gem; besides being dirty and carbon-y because of its age, it is in great condition. I am refurbishing it in class and now my question is: should i sell the engine as a whole (what do they generally go for)? Or can i get more for it in parts? any imput is appreciated! thanks!

Not many desirable components on a 280z motor so sell it as 1. $200-$500

You may be able to sell the head on ebay $100-$300 but then you gotta find a local buyer for the block.

If you wanted to get max $ then you gotta disassemble it, clean up the parts, take pretty photos and do the ebay thing... lot of work.

Agree with Blue, take some good pictures of everything, including parts like the distributor advance mechanism. A video of the engine running would be even better, if you have an ECU and an AFM you can get it running on a stand. There are lots of used engines out there but most of them are mystery motors, that have been sitting for years. Somebody who needs an engine would probably pay a premium to know that it's ready to drop in and run.