None of my business but if the seller isn't willing to measure the pistons for skirt diameter etc... I wouldn't buy them. Good 40 yr old pistons are very rare.
The piston were used pistons and he was not sure if they were 273 pistons.He has had them for so long he just could not remember.The part number on them are 2465658 and 2465661.These numbers did not match what 65dartcharger listed.