Strong short block

rrvolare said

Moparofficial --- i think you are concerned with RPM ?.......... Ok .... 6000-6500 rpm.., but i think that was addressed with well prepped block , quality /light rotating assembly , modified oiling.... partial hard block ... and quality fasteners/ 4 bolt mains ....only concern i have is hard block ... cooling for street driving... thanks

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If you put 4 bolt mains on a Pcar block, you are inviting catastrophic destruction. Those blocks were never designed to use the outer bolts. There isn't enough material there to hold the load, even if you use a 5/16 bolt. A 4 bolt Pcar block is weaker than a 2 bolt.


Just because stuff like girdles and 4 bolt caps are made doesn't mean you should use them. All they do is lighten your wallet.