I had to sell my S2 88 a few years ago - a 1961 full on project. It'd been stood around for a few years on the drive, I'd spent £1000s on parts incl a new galvy chassis but ran out of money, had no time, and it was just getting me down seeing it taunting me so I ended up selling it all


Mechanically it was fine (amazingly!) It'd been a trials vehicle so the body was totally shot - where it had been damaged, the PO had riveted in a replacement section... but he'd been pretty keen on the oily bits. I'd bought a nice S3 88 to donate the body (it had a broken back), and at one point I was going to restore that instead, but as I said, it all ended up being sold off.
The S2 has been rebuilt by a chap in Leeds now, and it running a 300Tdi on veggie oil. I doubt a Td5 engine would fit to be honest - its an enormous lump, IMHO a good 300Tdi is the best option.