why dont you go waiheng
wasting time here sourcing for a 2nd unit
some more
you also need to go exhaust house to fix the piping if you buy the 2nd unit
no difference maybe worse
better make a new set
it will help you ease your neck of pain
I'm a bit of a newbie in regards to rotaries, but I'm planning to get an FD engine I bought, rebuilt and the guy I normally go to quoted me the following: