best way to do it would be to slowly build up parts putting them into a ke70/ae71 and saving money while your at it. then once you've red driving aura has reached the same level as the amount of money you need for a notch back move accross then.
pull std. gear back in ke70/ae71, leave 4age in it and profit???
not trying to poke fun or trying to burst your bubble but getting into debt for a 25 year old car's is a bit of a risk