In my 68 satellite with RB motor I’ve run 1-3/4 Eagle(from the 80’s), and Hooker 2” super comp.
I had some SR heads on a RB motor in the car, and installed the TTi 2-2 1/8” step headers for the Indy heads. They were the easiest of the 3 to install.

On my 383 B engine I ran Hooker Competition headers , which are 1-7/8”.

In my car, the Eagles and Hooker Comps were actually harder to get into the car than the big headers, but once installed I felt all four sets fit pretty well.

If you have angle plug heads, the TTi’s generally have the best plug clearance.