No point fitting then removing bushes - its a lots of work and is risk of damaging the bushes for no real reason. If you want to assemble in the meantime (but not drive) then people have used everything from wood, through layers of tape to custom turned aluminium bushes in the mean time.
1.8 with IB5 - Back end too rusty but great learning 2.0 with MTX75 - Donor of choice Last RTR Sonic 7 Chassis final piecing together Body Panels in Bloodhound SSC
Will try a similar method for the bushings. Was actually even thinking of replacing the bushes by balljoints, but I guess that's overkill and maybe more uncomfortable. Will evaluate when I have the kit in my hands.
Regarding the MSVA docs, hmm interesting. It seems I now have some reading up to do. First thing I noticed I will need to replace my standard Hayabusa speedo dials with MPH dials... The odo will still not read MPH if I do so, but I guess that's OK?