Overheating during cam break in - help

Thanks!

I have not checked timing. Do I need to be at idle to do so?

I tried to adjust the float on the bowl, and I replaced the needle. As it turns out Holley had a defect which caused the inner lining of the bowl to flake off, which was apparent when I took the bowl off. I put a new secondary bowl on and it's working fine now. I'm told Holley will give me a new carb if I return the one I got.