Good point Steve, I forgot to mention spring pressure(s). Don't skimp with solid lifter profiles they do NOT run into any lifter "crash" or hydraulic lifter "pump-up" issues at higher RPM's.
My "hybrid" set-up will rev right to and past 6500rpm's so quick at times it's difficult to move the shifter quick enough to prevent it from going higher!
My last 455 with HR lifters started to act like I had a rev-limited installed around 5800rpms.......Cliff
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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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