It isn't necessary to extend the brake stay or the brake linkage. Each swingarm comes with new swingarm bushings installed. These OEM Honda swingarms are refurbished but unchanged other than the extension. None of the original brackets are ground off.
The unit is painted to prevent corrosion but will need final body work to cover up scratches left from metalwork. The item "1968-1973 Honda CB350 extended swingarm kit cafe racer brat scrambler tracker" is in sale since Monday, April 22, 2019. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Antique, Vintage, Historic".
The seller is "offsetmotorcycles" and is located in Pacifica, California. This item can be shipped worldwide.