Uh Oh... my shaft has issues

[nitromania]

Finally started tearing the '78 Nitro apart. I knew there were issues down under: track is junk, suspension is frozen and I pulled this out this afternoon.


Drivers are split where the shaft swelled and shaft is junk. So I'm planning to swap in an Indy skid and track.
What can I use for a driveshaft that'll fit?

[nitromania]

Better pic of the split. What causes this?

[mrmotors]

That is called inter-granular corrosion, the part blows up from the inside out. Generally the cause of it is improper heat treatment.

[nitromania]

Thanks, hadn't seen one come apart that way. Reminded me of Toyota trucks frames that seem to rot away in layers.
It's really light compared to a steel shaft, but def needs replacing.