No run in period needed. Just go handy for 4-500 miles and then drop the oil to allow for any contamination when the sump was off. The crank rides on a film of pressurised oil and does not make contact with the bearings in normal operation.

Run in period is intended for running in engines where there is metal on metal contact such as piston rings, cam lobes etc.

400-500 miles , oil and filter. Then drive as normal.

But of course do what you feel is right. Most garages will tell you to do a run in period to cover them selves I would imagine.