Recognize these heat exchangers? Options

[motofoto]

Hi all,

I bought what I thought and was advertised as a set of 914 2.0 heat exchangers on eBay, but when installing (after I took the time to refinish them) I noticed they appear to be 1.7/1.8 exchangers. I now see the swooped up end compared to my old set. My mistake in believing the seller.

The weird bit is the flange that attaches to the head. In all the photos I can find of 914 exchangers none look like this. They don't have the leeway in install that the others I see have, since they are holes instead of slots.

Anyone know what these actually are? They are not stainless, a magnet stuck. The silver set is 2mm smaller I.D.

Trying to figure it out, so I can either use them, or sell them properly.

The sliver are the ones in question, the others are the old 2.0's.

Thanks in advance for the help!

Anyone have a nice set of 2.0's for sale? :-)

This is the flange I'm unsure about:

(IMG:http://www.914world.com/bbs2/uploads_offsite/forums.pelicanparts.com-21169-1503616960.1.jpg)

Here's the bit that makes me believe they are 1.8 HEs:

(IMG:http://www.914world.com/bbs2/uploads_offsite/forums.pelicanparts.com-21169-1503616961.2.jpg)

[SKL1]

I believe the original exchangers on my '71 had those holes instead of slots where you mounted to the head. Still have them in the attic somewhere and could confirm.