I am new to the Holley carbs always raced T Quads. I have been working on our restored V code Cuda have it running good now.
I am starting to work on the 340 for my D/S TA. I am going to put QFT billet metering plates on the end Carbs. I need to buy a selection of jets. I have 62's-68's for the center carb, I am thinking 80's-86's for the ends. I don't want to buy a whole bunch of jets that are gonna just sit in the box. I want to be in the ballpark. What do you guys think? Also is there a difference in jets from different companies?

Thanks, Rod