also the roller my buddy has has 4 passes on it, it's .670 lift 280 duration, has matching springs, retainers, and lifters to go with it
There is a big dfference betwen a 260 @ .050 roller cam and a 280 @.050, especailly if the bigger cam is a drag race only cam for a power adder motor
Why did your buddy take it out?
Make sure and set each valve spring up at the installed hieght and check for how much pressure differences there are, if they vary more than twenty lbs on the seats and more than fifty lbs opened and you can't shim them to get them within less than 20 and fifty with at least .060 clearace from coil bind replace them
I like to have within 5 lbs on the seats and 20 lbs opened and I shoot for between .080 and .060 from coil bind on each spring
You can swap the inners springs and dampener to get those results
