I dont have much to say about Jeff Tudor
I got my head from him and thats all I will get from that shop.
My advise and from my experiance is to off those reeds and cage and put the stockers back in . Jeff fabs his own 87 adaptor cage for the mototess and that may or may not have something to do with it? Its actually a 88 and up cage because mototess doesnt make one for the 87.
I would not have him port my cylinder either. you are better off keeping it stock for reliabilty IMHO.
Raise the compression a little with a 62cc dome and coolhead, Main jet it 2 sizes up from stock,lower the front sprocket to a 12 /42 with a PT pipe and 9 paddle haulers....and you might be able to catch me

j/k
As far as the shocks
They are from a seller on ebay and you can have the spring rates for your bike and weight.
The rear I had rebuilt locally.