needle and seat

[scampy72]

hey all i have a slant six with a holley 1920 carb and need to get a new needle and seat assembly, was wondering if anyone can tell me the oriface size that i need? walker products has two listed and the only difference is that the oriface is bigger on one of them.
thanks
marc

 

[cudamark]

I haven't heard of that but as long as they close and seal, it shouldn't make a difference on a stock motor.