what psi should the cylinders of a 68 440 have

[73_RoadRunner]

i have a older 440 and runs pretty good i wanna put a new .557 mopar solid cam in it and have the heads done 3 angle valve grind and ported polished i dont really wanna put new rings or pistons in it now cause it runns pretty good what is the lowest the psi should be before i would need to put fresh rings in it? what should the psi be for good operation?

[ehostler]

The PSI of a compression test is only good for telling you if you have a problem. As long as all 8 cylinders are within 10% of each other, you are fine. Actuall PSI numbers will differ depending on compression ratio, cam profile, and any head work that has ever been done to the engine.

A 3 angle valve job is old school. If the heads are apart, you should also go with hardened exhaust seats and 2.14/1.81 valves and then use the proper springs for the cam that you wish to install. Once you've done that kind of work, you are just a little shy of the cost of the EB heads that will perform better.