Block off turbo oil return on 1z?

had to steal the turbo off my scirocco tdi build, since its been taking forever to finish it the swap i want to make it a non turbo for now. wondering the best way to block off the oil return line. The banjo bolt looks huge, anyone know the thread size to get a bolt to put in there?

otherwise i may just bolt on a block plate on the part that bolts to turbo but that would look bad and be unnecessary

M18x1.5 bolt with a copper washer if you are referring to the oil drain hole in the block.

bolt as jhax recommends or a drain plug from advance, just did this on a 1Z vanagon

Awesome thanks for the replies, i plan on getting a tune for it, but how bad is the power? i used to have a NA rabbit 1.6D im assuming it will be slightly faster than that