i am selling my holley intake kit and want to go weber downdraft, i am going to buy racing beats downdraft manifold

my question is they say its for the weber 48 ida, i found a weber 48 IDF? is this the same carb as the IDA or whats the difference, they are both downdraft ?

can someone enlighten me?

 

Here is a little info on the two carbs.....

http://www.redlineweber.com/html/Typ...ght_choice.htm

 

thanks a bunch

 

so another question, the 45 dcoe, would that be good for a stock port 12a?

 

not sure...i would call mazdatrix