Look again, I just put a couple bolts in for pictures. But there's 2 bolts holding each carb down.

The goal was to fit the carbs without adaptors or modifying the intake. Got really close, just need to clearance the plenum openings for the throttle blades.

I still need to plug unused vacuum passages in the throttle plates and figure out a PCV port.

Then lines (easy)and linkage (still debating). I'll fab a air cleaner baseplate and buy a stock style lid and element.