Cam time!
Cam design and selection is my favorite part of engine building. Some engines, like the FE and Cleveland need really specific parameters that are only found by years of dynoing and racing.
A Cleveland guy on my forum emailed me and said that he had another builder spec him a solid flat tappet camshaft for his 408C and he wanted to see if I could squeak him out anymore power for the drag strip. I made him go .4 of a second faster......that's about 80 hp worth.
FE's respond better to a specific shape of lobe on a hydraulic roller. Some guys like to spec aggressive lobes (such as Comp Cams Xtreme Energy or XFI series) and they end up losing horsepower and rpm both. Some lobe designs make a lot more torque than others.