well what ever rolla you decide to get to start the conversion like many people have said there are many great builds happening at the moment and well if its 4age ae71 is probably the best bet but my mate is doing it to a ke70 his build thread is http://www.rollaclub.com/board/index.php?showtopic=34062
thats to give you an idea of what he has been doing to get a ke70 to where it is still beenin built and its got the 4age motor in it
thats only if you decide to go that way but i support the other in saying that you need to think about it and do what you feel is right and or with in your buget
that is
i am not really thinking of motor in my car yet i have been throughing ideas in my head but still not sure cause i know i am going to research before i get to the engine stage
just me 2 cents worth for you