The Stovebolt Site Forums The Shop Area Engine Shop Offy 2 Carb setup

I am researching options for improving my intake/exhaust setup and need some clarification. Right now I plan on using an Offy 2 carb intake with Fenton cast header. I was going to use Hedman tube headers, but I was informed that they tend to rust/leak really fast. As far as the Offy is concerned, a friend told me to use 2-2BBL "progressive" carbs instead on 2-1BBL carbs. I however have no idea was a progressive carb is. Can someone enlighten me on this matter. Also, are there any particular carbs that should be used?

thanks
jf
1966 C-10

A progressive two barrel is one where one barrel opens after the other one is open, like a 4 barrel. The Weber 33/36DGV is one such carb. You can do that, but it requires adapting to the manifold. You might consider just using a better one bbl instead of Rochesters, like the Zenith.

We switched my friends 261 from dual rochesters to the Weber carb. Huge difference in performance. The Progress carb allows you to maintain low range torque with the mechanical secodaries. The problem now is intake flow, we're thinking about cutting the intake and adapters, then welding them together.

JF;
Been thinking the same thing for my 261. Langdon's Stovebolt (see links page) has these for sale. If you talk to Tom, he will be able to tell you all the pros and cons. Let me know how you proceed as I'm not figuring to do this myself until fall.