Yes, that would be lean running off idle.
Get the accelerator pump cam assortment kit for holleys from summit, and get a jet kit too.
Start by bumping the primary jets up 2 numbers, and installing the blue or orange accelerator pump cam.
And of course make sure the accel pump linkage is properly adjusted as well.

If it is still a little lean after that, bump the jets up another 2 numbers, and you should be golden.

Oh, and make sure you have enough timing too. (which you will also be able to get away with a little more of with more fuel delivery there.

Good luck.