You ARE a sucker for aggro - best of luck getting it sorted!
Sikaflex 221 is your friend for sorting those body leaks - and good seals round the rear lights.
IIRC, there is a box (one of several!) behind the glove box, which drops the voltage to 5v for the bus system. There is a spare 5v port on it which you might need to tap. At least until you can find which bits are missing/incorrectly wired.
The good thing is, being hand-built, there is quite a bit of adjustment in the front panel alignment. The bad thing is, it takes time & patience to get it looking square.
Nick
“I find myself irresistibly attracted to cars that nobody else buys. The NSX is a classic of the genre because nobody buys it and yet it’s a fantastic car. It’s got a wonderful compactness and simplicity and unpretentiousness to it. Honda rudely continues to make them whether we like it or not, even though there can be no commercial logic in doing so — I thoroughly admire that.” Rowan Atkinson