hey guys really need to know the differences between an N1 oil pump and stock GTR oil pump for 33 told when bought car it was N1 but mechanic doesn't think so, pictures would be great so we can compare, otherwise dimensions would be appreciated
how would i calculate the strength of an engine. was looking to put forged pistons and rods with gapless rings aftermarket bearings stock crank, multilayer head gasket, cams etc