You know there's a length difference between the two cars, right?
But since you have a free exhaust from an SR, the cost to have that hacked up, extended, mounted and shaped should offset and be cheaper than a replacement - so you're good to go. Take it to a good muffler shop.
Thanks for the quick reply. I have a 3" DP already in hand for this beast so I may be tempted to just go with a new cat back in 3". crazy I will keep your offer in mind. my motto is to always pay it forward and I would ask the same from you. More to follow. Luvin the new R.
Just for posterity's sake...in my experience the S60R exhaust is about 4 inches shorter than the V70R exhaust. This extra length is between the resonator and the first set of bends to fit under the rear diff. Beyond the bends, the hangers and other geometry are all identical. For a swap in either direction, the easiest thing to do is cut off the resonator and weld on straight pipe with a flange to attach to the DP (ie, the JRL mod). While you're at it, remove the EBD and call it a day.
Any shop that can cut or weld exhaust pipes can do this job in 30 minutes or less. Thanks to dumb exhaust experimenting on my part, I've now done this process twice.