Big Block Piston Rod Question...

[62maxx]

Hello again,

will stock 1963 Chrysler 413 piston rods fit into a later year 440 block without any problems?

Thanks again!

 

[Lefty71]

Yes, they are actually the same part, most likely LY rods....invented long before the 440 was created.

 

[Curiousyellow71]

They should interchange...

 

[Runcharger]

Those 413 cranks have the large wings on them, not sure if that effects the balance of them.

 

[33 IMP]

You should be able to use a 413 crank and rods in a 440, assuming it's not a real old 413 crank from the cast iron torqueflite days (different longer rear flange).
You WILL have to rebalance the assembly . Piston and rod weights being close enough not-to is highly unlikely.
You might want to mag the crank for cracks before you spend money on it grinding, polishing, and balancing.