can someone state what actually needs 'running in' in the bottom end of an RST...
there is VERY little which will require any sort of running in at all.. the bearing shells etc are ready for full use straight away.. and with the exception of a few types of rings then you can litteraly go for full power immediately...
Having said this.. 1000 miles is a fair 'run-in' period... all you will be doing in this time is to check that nothing is knocking or banging and that the car generally drives as it should and there are no problems.. overfueling, boost leaks, niggly problems you may get.

Seeing as you dont actually know what you have in your engine... you may as well take it apart and see for yourself.. there is ABSOLUTELY NO POINT trying to modify this engine without knowing exactly what you have to begin with.. for all you knwo the engine may have been to the moon and back!
It may be running standard compression, it may have forged pistons.. it may have a standard head.. it might not.. hell you may even have a fuck off crack in the bore wall!
My point is without knowing the technical spec of the engine you have a tuner is just going to say what i have above.. that there no point modifying it till you know what youve got.

there is also no way of telling the compression ratio without measuring the camber volume, or by 'guessing' with the height of the piston. both of which will require the removal of the head. While this is off you can inspect the bore walls, and removal of the sump and one main bearing and one big end will give you an indication as to the condition of the crank.
A good mechanic could prob do all that in about 4 hrs max.
You would then be left with a complete list of things that need fixing and things that are ok.
CheeRS
Phil