check out
www.nissanperformancemag.com theres a project 200sx that has been
also I dont know how reliable a turbo charged GA16 on a rally would be
the only class I think you can get into is production class where its only two wheel drive and everything is mostly stock that means you cant mess with a weak engine to make it stronger the GA16 stock will not be able to hang with most of the other cars
Group 2 class is up to 2.5L in that case you would get you ass beat no matter how good you are and you limited to how much you spend in upgrades
it might be better to get a different car audi quattro celica All-Trac lancer WRX and aim for the production GT class