like nismoid said, and i said before you posted this.
a Nitto stroker is out of the question.
youre looking at 15k for the 3.2 assembled with oilpump,sump etc..(or external pump)
because youd want 2-3k worth of block prep if youre looking to utilize that kit.
30k would get you a 3.2l long engine...then you can use your 20k to buy the bolt on bits.
then you'll need a clutch,gearbox.... its really just pointless for you.
build a 26 or a 26/30, youre saving yourself 5k just for not having a stroker crank.
10k for the engine, 10k for the bolt on parts (turbo setup, fuel system, ecu, tune...if u shop wisely.
and i'll also add, that a 3l bottom end was an alternative to stroking a 26, so its still a stroker motor if you want that