Thanks.
I used Grade 8 just because.
Im sure the plastic will snap off well before the bolt.
The 400 swingarm is a direct bolt on,with a few minor mods.Jay handled the welding mods for me as part of the deal.Its shorter than the stock swinger,so the chain must be altered and a few other things tweaked.Im sure the shock will probably work too,but I opted for something a bit newer and modern.An 06' GSXR750 rear shock will bolt right up with a minor bit of grinding to the lower rocker.It offers high and low speed damping,is rebuildable and of course its brandnew.Got mine for about 40 bucks from a race team setting up a new bike,so it was literally brandnew.