I bought my tray mount from Jegs. I called and told them what size my scoop was and they found me a tray that you trim to custom fit. The cost was $90,00 with shipping. I will try and find the part number. Here is a picture of when I was fitting it. Remember the hole that goes around on top of the carb needs to be stepped up to clear the bowls. Example on the 2nd pic. Hope that helps a little
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