[1.2gees]

86 vs. 86 turbo? I assume you mean the bare block only. If this is the case, I believe there maybe very slight oil passange mods at the bottom, and cylinder liners should be thicker on the turbo block. I've heard that these two are interchangable, I've actually seen it done on a turbo S that drove like a piece and leaked oil badly but it's owner thought it was fine... Anyway, this is a tough call, both the turbo and the na blocks were updated in late 85.
Ahmet