I'd potentially sell mine, KA24DE from a 94 nissan bluebird. Had it professionally rebuilt approximately 40,000km ago, spec up on the pistons but no cams or port work done.
Its in my U12 so all the hard work of converting has been done, and its connected to a manual LSD box.
Only condition is that you have to buy the whole car with a few other go fast bits (see my project thread for info on it).
PM me if you have a number in mind, not desperate to sell but if the price is reasonable I'd be willing to sell... I'm thinking I want a van or mini truck.
otherwise I'm happy to offer any assistance/photos on the conversion works (there's a chunk of fun wiring to be done).
Good luck!