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MFI and EFI bottom ends are the same except for the CPS hole so your better off getting a EFI one if you can, sorted for future management upgrades then.
was gonna say, id go for the efi bottom end if you can for the above reason. there was a forged internaled block in the for sale section not long ago, about 3k miles oles. was reasonably priced aswell. would of had it my self but moneys a bit thin on the ground atm