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Hey team I’m new to the game and want to rebuild my motor I have a 4th gen 2003 Legacy Gtb with the Ej20Y and am in need of a new block and am curious if I can use a Ej207 shortblock with everything else off my motor? Or what needs changed if anything?

So the tensioner assembly arrived from Rock Auto. Managed to fight the car to remove the old one without having to remove the power steering pump. Glad I opted to order the whole assembly rather than just the pulley, as it turns out the assembly was damaged. Then it was another battle to try and fit the new assembly without being able to see the bolt holes. Universal joints came in handy here. Once back together, belt on and bleeding the coolant system tomorrow night.