Denny,
The Carter/Weber is for a smaller cube engine if you are running a single. The Holley/Webers from Langdon are the best for our applications larger 235 ci and 261's. I'm running one now on a .060 over 235 about 244 ci. If you are runnina a dual carb set up on a 235 or 261 run the smaller Carter/Webers like someone said above. "Remember more carbs don't add fuel they add air" The Carbs need some tweeking as they are not right out of the box if you are reading plugs. Everyones engine is different so the carbs will need to be played with and the Holley/ Webers will give you lots of changable jets, emulsions tubes and air corections to play with to get good plug readings. I'll give you my set up for my altitude of 421 feet above sea level. For my Holley/ Weber this is what I ended up with by "reading plugs". Primary idle jet 75, Primary Air Correction 185, Primary Main Jet 132, Primary Emulsion Tube F6, Pump 50. Secondary Idle Jet 50, Secondary Air Correction 170, Secondary Main 147, Emulsion Tube F50. You must use a regulator verified with a guage set between 3+1/2 to 4. Idle air fuel mixture not more than 2+1/2 out. The 2+1/2 out is achieved with the idle air jet. I had to go up to 75 to achieve. If you want to use a electric fuel pump a Carter is the way to go, can't remember the stock number. If you need help let us know.
