I just had exactly the same problem when fitting my Ashley manifold, i had a new BOSCH 25909 Starter motor on it and the manifold hit it by a good 20mm! i went to a scrap yard with my Bosch one and rumaged through their pile looking for one with the same flange dimensions but shorter, i ended up with what i think is a AC Delco one but it didnt have a name on it just made in Italy and was ment to be off a Zetec 1800 escort. i think there are possibly 3 different makes of starters standard to the front wheel drive ZETEC engine and all being different sizes, picture of the two starters and how they did/did not fit.
Hope it helps.
to big BOSCH starter couldnt fit manifold

the two BOSCH and i think AC Delco side by side, with the smaller one fitted the manifold cleared ok (But still hit the breather and cross member

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