I called AZ & same thing, the same part #'s & they said they also have a pricier melling performance lifter 290114 (not sure if he assumed a JB in front of that # cuz he just got done mentioning the JB2011 in the conversation & he said they both in their pic show the top hole & I explained the inner hidden hole that is needed but he did all he could & I told him I appreciated his (good faith) effort. Are the (10 minute) used ones a no go??? If so I might just have to open em all up (32) & swap the flat metering plates (I can hardly wait!).