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Hi everyone, I am new to this board. I have purchased a 51 Plymouth Cranbrook Belvedere with stock 218 flathead 6 that I will be trailoring home next month. I've been scouring the internet looking for ideas on a dual carb, dual exhaust setup for this engine. I have seen people using everything from weber 32's, to strombergs, to holley 94's, to 9 super 7's for twin carb setups. I would prefer to stick with a pair of carter ball and balls to stay true to period. I see the offenhauser dual carb manifold available on summit racing with two hole flanges which appears to made for original carter carbs. I am looking for the right pair of carter ball and balls to pair with this engine. My homework tells me I need two single barrel carbs which are approx 125 cfm's apiece based on the amount of air the 218 is capable of sucking. I didn't a picture of the stampings on the existing carb, but it looks like this car would have rolled out of the factory with either the Carter BB D6H1, or D6H2. Just looking for advice on a pair of Carters for this setup, I don't want to be running rich, want to be right in the sweet spot. I cannot find any technical specs on any of the old Carters on the web anywhere, if someone has a pdf file or link on this can you please share, or just let me know what has worked/hasn't worked from personal experience. Not looking to get performance crazy, just looking for a modest step up in performance. I may add an aftermarket head for a modest increase in compression at some point down the road. I'm at 7100' above sea level which means I'm already losing HP, and will need to run smaller jets than most of you. I want to stay stock but will need every ounce of HP this engine can make, without spending thousands of dollars on boring cylinders, performance cam, etc. Thanks in advance, Greg for SW CO.

File Name: Hopping Up Th' Plymouth.pdf File Submitter: P15-D24 File Submitted: 17 May 2015 File Category: Reference Information Performance article for flatheads from Hop Up, October 1952 Click here to download this file