I dont really know the 929 very well but ill say this:
RWD: possibly...it'd take alot of work though
FWD: you'd be better off fitting a truck engine on a motorcycle...unless the car was converted into rwd
You can buy falcon I6's from as little as 200 bucks, but if you want to get a decent (say el xr6) engine they can get up to $1500. However it does all depend on the condition of the motor.
But IMO you'd probably be better just selling the 929 and buying a falcon...seeing as IMO theyre better