I have aquired a 205 block which has small core plugs 20mm in diameter , I have no gg engine number stamped and it is blank above the water pump, there is also no stamping for the bores next to the dizzy either, it is a ford cast block, and the head that came of it is a 2wd 3 bolt stat housing , with casting starting v86 which I believe is rs500 , my question is obviously with out the gg engine number it's obviously not from a car or a spare built engine but is it a proper 500 spec block, there is an engine number stamped which starts JL which I believe is sept 88

Any help please?