The rockers are the same with spray bars that are on my friends RB built hemi 572 CI. Was close to the first one Barton built back in 1999 and yes been rebuilt a few times and still runs 8.90s without reving the motor. Myself I like those rockers on a race cars and even a street cars. I would check them every Winter or specific period of time and make sure the oiling is super clean but we do that with this motor and have never had a problem with them. It is nice to be able to access the Valve spring without sliding the shaft out. Back in the old days whey my Challengers motor in early 70s had a shift point of 9000 an 10000 through the traps this system would of been so nice to have instead of the long shaft system. Push a 426 to those RPMs was just normal in those days and you cam up with some broken V Springs.