My '57 2 ton has the original 283 with no damper bolt, I pull the damper when I replaced the cam, lifters, chain and sprockets. Re-installed everything as it came from Chevrolet, been driving it for 7 years at high RPM without issues.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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