Hello all, had my 69 A12 Superbee out a few weeks ago cruising the streets when I heard a poping noise coming from the carb. Limbed about five miles home doing under 20 mph..Took valve covers off and noticed pushrod had punched a hole thru rocker arm on number 5 cylinder exhaust valve. Took rocker arm shaft off and fished out the lifter and noticed that it too had a hole punched in it. Have never heard of a push rod going thru both lifter and rocker arm before and can't figure out how it could be possible. The valve is not stuck. Put lifters, rockers and rocker arm shafts from another 440 in and it seems to run fine. Any ideas on what the cause of this is? Most people don't seem too concerned, but I would like to know what caused this. Thanks and take carer, B.C..