"The initial V8 conversion was performed by LOJ Conversions under prior ownership, and four months ago a replacement LY6-based 6.0L V8 with LS3 valvetrain components was installed, also by LOJ. Prior to installation the block was cleaned and painted, and the heads were tested for cracks and fitment. Other recent work included new front and rear main seals, an LS3 intake manifold and gaskets, head gaskets, header gaskets, oxygen sensors, water pump gaskets, spark plugs, fuel injectors, crank damper, and an Aeromotive fuel pump and adjustable fuel pressure regulator."
So they put a motor in it, then they put another motor in it, then they changed pretty much every seal and gasket in the new motor. No wonder they're selling the car, they're sick of it.