If you switch to the solid roller cam and lifters make sure you upgrade the valve springs, keepers, retainers and pushrods Make sure you have at least .060 from the bottoms of the keepers or retainters, which ever is closest to the valve seals at max lift Take the time to verify the max lift at the retainers as well as check the piston to valve clearances also
Degree the cam in, do NOT ALIGN the dots and ASS U ME that cam is timed correctly
Little things can mean a lot, if not checked properly