Bike carbs are designed to run under vacum, if you try putting a bar of boost up their arse they might have sealing issues. I'd try to do a bit of a drop test if you can on one of the TBs....seal it all up and fill with a measure of gas (welding gas works well) say at like 3 bar and see if it drops much, or if it pushes out any internal seals etc...

If it holds the pressure then there's no reason why not to use them.

Cheers
Dan