I used these to attach to the tubing:
https://www.summitracing.com/parts/sum-2200075b
https://www.summitracing.com/parts/sum-2200077b
Using the above will not require a 37° flaring tool, which is not common.
I bought a flaring tool for some reason, thinking I was going to use the tube nut/sleeve combo like these:
https://www.summitracing.com/parts/sum-220633-2b
https://www.summitracing.com/parts/sum-220634-2b
With the tube nut and sleeve, you put the nut then sleeve on the tube and flare the tubing and you can then connect to a male AN fitting.