I have 92mm pistons running too much boost 2.2b with T4 on a 205 for 7+ years now. It will let go in the end obviously but its great while it lasts

not ideal but I had the pistons and random block so why not.

I wouldnt advise it unless your prepared for total destruction. Better off buying a 200block if building a new engine for the sake of it. lets face it a 205 block is worth 100quid. For 500 more you have peace of mind.