Hi, could someone please help me with the following, I've got a st170 engine to go into a mk4 escort, I've bought a ib5 from a ka rear starter hydraulic clutch but when fitted to the st170 engine the bell housing bolts only line up on the top bolts the bottom ones are out, am I missing something hear as I thought the ib5 was a direct fit to the St lump, hope that makes sense and someone can help with some info

Thanks James