There are 3 holes, I'll refer to them as 1, 2, and 3 left to right. 1 and 3 are along the same plane, 2 is a little over 71mm below that. If you make a template, draw a line 190mm long mark hole #1 center 5mm from the left end of the line measure 178mm along the line from hole #1 center and mark hole #3 center.
Dart's LS Next block requires a special oil pan to seal to the block and the front and rear engine covers. Moroso's oil pan features a non-stepped oil pan flange and a pair of 2" billet aluminum spacer rails that sandwich between the block and pan.
Porsches have been producing high horsepower, low emission engines for decades so how did Porsche solve this problem? First, each cylinder had to produce 1/6th the total HP compared to 1/4 on the VW motor. 2nd, the heads use large valves and a hemispherical combustion chamber.