They have the 8-9 thread spark plug holes.

 

yes they will fit if the description is accurate. The high bidder got an awesome deal if the heads are the same as the description.

 

I removed the ebay link, I wasn't sure if there were forum rules against that.

I was pretty sure that they would fit a Lightning motor, but I didn't know if the smaller combustion chambers would create problems on older engines with the increased compression ratio.

 

You can always use thicker MLS head gaskets to drop the CR back down.