Tried one set of Scorpion full roller rockers here and this is what we ended up with. 13 out of 16 cracked in exactly the same manner......and YES the engine was using higher springs pressure and a full "race" set-up. I've been chastised for using those rockers in that application but aren't we supposed to "upgrade" from stock rockers when we install solid roller camshafts, stronger valve springs and start spinning the engine past 6000rpms?........
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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