As far as I know, there are no headers that fit a 170 slant, in any "A" body.
You can buy the Clifford "shorty" headers (fit 225 only), and modify the front three pipes, to raise the collector up about 1.5 inches, to clear the steering box.
If you have power steering, there is even more of a problem.
Link to the Cliffords.
http://www.cliffordperformance.net/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=CP&Category_Code=MY
Clifford has had some issues, with delay in shipping, so I would suggest paying only with a credit card, and only after making sure they have them in stock.
Since you are in Sweden, it might be cheaper to buy flanges used, or from ebay, and have a local shop make a set.