Im not 100% sure what you mean by carb pad but I think this is what you want. Its a BBD for sure, not sure which specific kind.
There is another thing I'm not sure about. two of the place to fasten the old car are for bolts and the others are studs. Not sure if that's normal or not, manual wasn't too much help on that one. I kinda theorized that maybe someone had stripped out bolts and some point and re-threaded the holes and put in studs.