This 2-piece adapter will allow you to mount an IDF (up to 48mm) on an IDA manifold. Both metric (M8x1.25) and imperial (5/16 x 18tpi) mounting hardware is included. Every Weber manifold I've ever seen has had one of these two sizes.There is no gasket to go between the two pieces so you will have to use an RTV type sealant. There is an almost unlimited amount of linkage options for the side of the carb so you're particular application may require some clearancing.
Or spacers on the throttle shaft to make everything work. These have been updated with a slot cut into the top flange to help with clearancing but you may still need to shave a little for YOUR particular application. The demand for these has been very minimal so I only make them as ordered. CARB IN PICTURE IS NOT INCLUDED!
The mounting on these will have the butterflies opening in the SAME direction if the IDA. I only mention for consideration of your linkage.
Every time I make something I try to improve it a little so your's may not look identical but will be functionally the same. The item "Weber IDF or Dellorto DRLA adapter to mount carb on Weber IDA manifold reverse" is in sale since Friday, February 5, 2021. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Other Parts".The seller is "ecdezz" and is located in Newport News, Virginia. This item can be shipped worldwide.