You going to listen to a guy on the other end of the phone that wasn't even born when the engine was originally designed???? I've called them a few times and the answers vary every 15 minutes, depending on who picks up the phone.
I am running a pair of 715 cfm OEM bone stock Holleys on my mild 427 (list 3300 and 3301). They are the matched set Ford BC/BD set designed for the medium riser application. And I am using the stock progressive linkage. The spark plugs, which are the defacto indicator or what's going on inside, look like they were sent down from God himself. All 8 of them, absolutely identical in toasty tan color and no indication of running lean whatsoever.
Send Carl's Ford Parts $1100 for a set of BC/BDs or BJ/BKs and bolt them on. Go run the car. If its better keep them and if its not, put them on eBay. Maybe you cost yourself $200 (knowing oblivious and blind eBayers you'll probably MAKE money) but then you can quit speculating.
