I'm looking for the 248ci dual carb rear spacer for a 1953 263ci motor I'm getting rebuilt that will be going in our 38 coupe. We want to run this as a syncronized set up not the original progressive set, running this as a syncronized setup the spacer is only needed to be able to run the original aircleaner. We already have the stock intake, dual exaust manifolds, Two good front carbs, air cleaner and even the original linkage (though I don't think we will need it) I just need to find a rear carb spacer, it doesn't even need to be in working condition. I've also been looking into a Stromberg 97 aluminum spacer like this https://www.ebay.com/itm/Fits-Stromberg-97-48-Holley-94-Intake-Manifold-Spacer-Aluminum-Riser-3-Tall-D-/232631030975, am I correct in thinking they share the same base layout? They make these in 1,2,3 and 4 inch if it will fit I just need to know what the height of the origanal spacer was so I can get one tall enough even if it needs to ge cut down. So can anyone confirm if this type of spacer will bolt up and if so how tall the original spacer was. Thank for any help. Here's a picture of the coupe, my Dad's sedan (he calla it his town car) and our parts car.