1. b Throw the engine together, get it running and sell the sodding thing.
2. Stop the Triumph from pissing oil
3. Maybe sell the Interceptor
4. Find out why the XT500 compression release sometimes does nothing and sometimes sticks "on" giving no compression... what larks!
5. Rebuild the DT250. That does have a spark though... and I now have keys to unlock the unused for 40 years petrol tank...