Hi Eric,

I agree that it looks like he could move the bracket plate to the outside as long at it clears that big nut on the suction side line.
It seems we are looking at two different compressor photos.
Maybe they vary by an inch or something or none. It is hard to tell length and depth or the thickness of the rear head or manifold.
Is there distance between the brackets now? They look to almost touch to me but the slot is too high.

I see the newer style magnetic clutch showing on his. The two compressors must have different oil fill ports as his is not showing.

I want to say yours is a Diesel Kiki of a more recent year. While his looks to have the newer style clutch system the compressor looks older and Volvo. Still both could be a Diesel Kiki.

I think the placement of the mounting plates is going to be set by the main engine bracket width and which way the lines have to attach.
The 2,7 and 9 series were kissing cousins over the years in this area. One side of the engine or the other side and then there was the turbo error, I mean era!

It's possible that this car is suffering from a mix and match week of socks during laundry cycles!
(:-)

All said, it should fit with the displacement of the compressor being equal in stroke length. Even if the stroke moved longer it can move more to the rear. It's the ear spacing that is fixed and centered to the front plate and the pulleys that count.
The number of cylinders is another story. I have read about the use of six and seven cylinders compressors. Volumetric efficiency can change a little that way too, just ask Honda Racing.

I don't know anything on what Volvo used or when they changed for what or even their reasoning, except they could!


Phil