I have recently built a 292 for my 53 chevy p/u, lumps/ported polished/70cc head/I used Lp pistons,262 crower cam, mallory distributor, backed by a saginaw 4 speed& hayes clutch, all is balanced and harland sharp roller rockers 9:5:1 true comp ratio,, motor runs awsome tons of power but I have a valve tap sound that you can hear in cab, we have adjusted the rockers cold,hot and running, but I still have this sound, I never used roller rockers before,, are they noisier than the stamped rockers?? Im just looking for some advice,, please help..any info please help..