Actually don't have the carbs mounted on anything and never have. Tried to work some 1850s and ended up with new 450s. My carbs have Ford secondary blocks from a 427 mid to hi rise intake. But decided not to run them as I'd read everywhere they are race carbs and not streetable and that's not what I want in my street car. Good luck. Following along.
Well, mine is 100% street right now. Car starts awesome and gets good mileage 12mpg average. I drove it to Mopars in the Park, 6hrs each way. Just need to tune the stumble going to WOT. Otherwise they are amazing