[QUOTE=pmh;559208]thanks for that rossco

for you guys that changed out the cams, be it jun, BC, kelford, etc, did you upgrade the retainers, spring, valves? I'd imagine yes, given that you won't want to part it out again later.[/QUOTE]

Springs yes...Retainers no...Avoid the titanium retainers out there, they spread over time & will eventually allow the valve collets to pull through....Ending up with a dropped valve & a nasty mess!

The heads I purchased came fully serviced with the Jun 264 cams, new springs, retainers & more importantly all the buckets were matched to the correct clearance specifications.
I am also using adjustable cam wheels. < as I am on the BC cams in another motor.