What the plates do is locate the LS motor in the location where a small block would sit.
The problem I had is a friend kept making frame mounts to mount the motor when I had bought a EZ Swap kit that included frame mounts to locate a v8 engine in the right location on a s10 frame. The friend said he had to make them because the LS motor had irregular or uneven motor mount locations on the block, like one side wasn't like the other like regular small blocks.
But by my measurements and naked eye I couldn't see any difference in the mount locations in either the motor or the frame.
I've known this guy for 30 yrs so I believe him but I can't find anyone that confirms what he is saying.
