Any body ever put a good set of 1.7 roller rockers on a 2000 5.4. Was it a noticeable difference

 

How would that even be possible on a SOHC engine

 

Ford modular V8 OHC engines are already equipped with roller cam followers,
not "rockers" in the true sense of the word. And as far as I know the lever ratio between the pivot point at the lash adjuster, the roller centerline and the valve stem cannot be altered. A change in lift and duration would require a replacement cam with altered lobes....I'm pretty sure there are some out there, perhaps at www.summitracing.com

 

If you want cams. Look up comp cams or trick flow cams. Both have quite a few cams and everything you need ( rockers, lifters, springs, etc)