well 75%+ of the running is done already get the standard boost running threw i and change the oil for some normal high milage mineral stuff do another 300 miles but use the car and the full rev range but don't thrash it then drop the oil and use some correct synthetic oil and get the cars boost and fueling set and take it from there.

if you done 200 miles driving like a faggot the rings won't have bedded in

mine get 10 mins with mineral oil holding revs at 1500rpm - 3000 rpm
drop the oil and filter more mineral oil then 50 miles of driving around on boost using the rev's but no thrashing then back for another oil and filter change this time some semi-synthetic rubbish and then 200 miles being used on-boost all rev's but no labouring the engine, then back for a final oil & filter change on 15w-50 full-synthetic and straight for a check up for boost & fueling and then driven hard so in total engine has done 300 miles+ then used hard it will of course still loosen up with more miles but out of 10+ engines i've built 1 has never failed or burnt oil.

it goes without saying that it get a full nut and bolt check after the 1st 50 miles but if you have done the job right you shouldn't have any issues