Running minus the SI board?

[LikeCDoos]

will all the functions on the cluster still work w/o a SI board?

I don't think so. My SI batteries went on my car and the tach wouldn't work.

I would love to figure out a way to completely bypass it, or maybe at least hardwire it instead of using those stupid little batteries.

yeah i had to replace my batteries as well, thats why i was curious if there was a way to bypass or hardwire the board.