well I'm glad to hear this one may happen :hmm:
but why oh why did you go the twin t25s? its been done before by forcefed6, who made decent power, but it didnt spool any sooner than a single, took up even more room, which is room your not going to have in a corolla.
i wasnt being rude to you, as i don't even know you, i was just outlining some of the basic things people don't think about.
depending how long the motor has been sitting, which if its coming from japland is probably quite a while, it may well be worth replacing the headgasket, as the composite materials go soft and it just leads to more heartache 6months down the track. seems you know what your doing :(
was the l300 classed as a commercial? that would have made life much easier :S