Hey Rocky. Way late response here... when you refer to 'did they modify', you mean the dealership. As far as my research went, old pics, talking with original owners and such - no. They came 'as is' off the dealership lot. I guess they felt the modification was the 'special' order of getting their hands on these '71 and '72 Swingers with an H-code 340. I still would love to get more info on this Black on black version, looks like a 'special' one.