Stock type 4 carb manifolds are 2 3/8" from center to center of the studs. Here's the plan, remove the carb mounting studs from the manifold, cut an adapter from 1/2" aluminum plate, counter sink the holes for the manifold and mount the plate with counter sunk flat head machine screws, you could through bolt the carb to the plate or tap the plate for studs or bolts if you prefer. A couple of gaskets and your in business for the cost of some aluminum scrap and some time. You may need to buy a hole saw for the throttle bore if you don't have one. If Kadrons have a bore larger than 1 3/8" like the manifolds you should spend some time enlarging the manifold as much as possible to match and taper the adapter if you can't get a perfect match.
I have some stock manifolds if you need a pair.
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