so the lsx376 is based off the ls3. an engine for cars this side of 2008. my car is a 2000. when dealing with a build like this it is important that all sensors are matched to the controller, and not to the engine. the older generation knock sensors that my car uses require a larger threaded hole than what was on the lsx376. so I had to drill the knock sensor holes to 8.5mm and then tap to m10x1.5. the first picture in my first post shows the original knock sensors that came with the lsx. and here is the knock sensors taken out of the valley on my old ls1 and screwed into the sides of the lsx block.
another trick to this swap is that a throttle body off a ls2 must be used. also a rh motor mount bracket off a 2009 corvette must be used. And I personally can't stand the batwing oil pan my corvette has so what you see in the pic is a 2005+ c6 corvette oil pan. I am stuffing this beast of an engine in my vette tomorrow.