I don't see an issue running stock or RE mounts even if the holes on the brace have been opened up 1mm-1.5mm. There is tons of surface contact, and the bushing isn't rotating or moving once A) tightened and B) under weight of driveline.
You could also just buy new E21 mounts, they're cheap and robust. What's the point in moving away from them?
For those CCV hoses, you can either try to remove the oetiker clamps carefully (to reuse), or buy hose clamps, but I thought the oetikers were avaiable by themselves through BMW, and that'll be much cheaper than buying the BMW hoses that I assume come with new oetikers. Can also buy oetikers on the aftermarket.
You could also just buy new E21 mounts, they're cheap and robust. What's the point in moving away from them?
For those CCV hoses, you can either try to remove the oetiker clamps carefully (to reuse), or buy hose clamps, but I thought the oetikers were avaiable by themselves through BMW, and that'll be much cheaper than buying the BMW hoses that I assume come with new oetikers. Can also buy oetikers on the aftermarket.
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