Holley instructions contradicting on fuel bowl level ??

One reason not to use those bigger needle and seats is as they get bigger, they are harder to seal. Also, they are harder to control. I'm saying as the needle and seat gets bigger, the fuel pushing on the needle has more surface area and therefore, at the same pressure is pushing harder on the needle trying to push it off the seat.

Before I spent 16 bucks with jegs, I'd call down to BLP and ask them about their bottom feed needle and seats. I use their .120 and it actually aerates the fuel much less going into the bowl. One bad thing (if it really is bad, I didn't think it was) is you must remove the fuel bowl to install the needle and seat. You can't just drop it on, or the needle will just fall out. But, any time I change the needle and seats, I just take the bowls off. That way I can dry set the things and be really close on start up.

If you want to pull the bowls and set the N&S, you adjust the float until it is parallel to the top of the float bowl body. That will get you real close and you can adjust it from there.

Also, if you run an electric pump, make sure the engine is running when you set the float level.