Originally Posted By '73-Charger-440
Thanks for the great info, although I believe the post 72 440 blocks are only rated to 6000 rpms, so I get nervous playing with the idea of pushing it too far, last thin I want is to send a rod into outer space.


I have shifted the 77 block in my Cuda at 6,000+ for over 10 years. But it is certainly a good idea to hold the RPMs to a minimum when possible. Regardless of the year.

Really never heard of an RPM limit on any given year block. work

Master, again and still