Hooker super comp. 1 7/8" small block

At the collector, how big is it?

2-1/2 inchs or 3 inchs.

I had a old school mechanic that raced small blocks for many years. A real old back in the day racer. He ran the smaller sized super comp in his A body Cuda to some crazy quick times with a 273. (low 11's in the 1/4. And that was really freakin quick for the 70's)