Trying to set up rear suspension linkage. MC18 frame and swingarm but Ohlns shock is for an MC21 so longer than stock at 302 mm. running 17" rear wheel. Stock MC18 and MC21 link plates don't work.

Has anyone tried this rear link kit from T2:

https://japan.webike.net/products/24601168.html

According to description it seems to be designed to work with the above setup, although it is not crystal clear. Any input appreciated, including appropriate spring rate for the reduced leverage ratio compared to stock.

Thanks all and Happy New Year.