The 455 is an EXCELLENT cam for 400's, 428's and 455's.
In a 400 build with RAII or RAIV heads and 11 to 1 compression hang on to your hat! It's a proven combo and has ran at the top of the pile in Pure Stock Muscle Car drag racing for decades. Of course you MUST team it up with taller gearing and torque converters with good torque multiplication (or manual trans) and there really isn't anything out there that will work better.
In a 455 build I like to see at least 10 to 1 compression using it. I've done a few 455's closer to 9.5 to 1 and it starts to become a little but too much cam for them as the idle quality starts to get "soggy" and power right off idle and lower RPM's start to suffer a bit.
In a 428 build couldn't tell you because I've never built one with a RAIV cam in it. If I did it would have at least 10 to 1 compression, a 3200-3500 stall converter and 3.73 gears or taller. In all honesty I'd probably push the compression up closer to 10.5 to 1 to help offset all that overlap........
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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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