I need to know if a Holley 350 CFM Keith Dorton Series Carburetor will work in my 1964 1/2 V6 2.8 liter Mustang. The engine size is 170. I also have the choice to get a 500 CFM carburetor from the same series. Which would you prefer?
IIf this is the stock 170ci engine its a straight six, not a V6. The best carb is a 350cfm. They are great motors, and if you wanted to use that 500cfm carb I would swap in the 200ci motor with a cam and high compression pistons with a Crossflow head and you have a screamin motor.
500cfm won't buy you anything unless the rest of the engine has the appropriate modifications. Why do you need a bigger carb?
For that car, keep it stock, with the original equipment. If you're looking for power, this is not the way to go.
Rebuild your original carb.
And going to a 200ci won't buy you much and you will be disapointed with the performance after all the hard work you put in and it won't be "screaming". BTW, early mustangs never came with V6--no such thing.